Wednesday

October 1, 2014

October 1, 2014

Posted by **susie** on Wednesday, March 17, 2010 at 6:39pm.

a. how much would you need to have at the beggining (lump sum) in order to achieve the mark of $50,000.

b. how much would you have to save every year for 20 years?

c. how much would you have to save for the first 10years and nothing more?

- personal finance -
**drwls**, Wednesday, March 17, 2010 at 7:41pmFor (a), solve the compound growth formula

X*(1.12)^20 = 50,000

X wil be the answer

For (b), use the calculation tool at

http://www.collegegold.com/calculatecost/savingsgrowthprojector

I get 619.59 per year

For (c), first calculate how much you need after 10 years to reach 50,000 with compound interest, without contributing for the last 10 years. Then use the computation tool of (b) to determine how much you must save per year for the first 10 years

- personal finance -
**Reiny**, Wednesday, March 17, 2010 at 7:49pma) amount = princ(1+i)^n

50000 = princ(1.01)^240

princ = 4590.29

b) amount = payment((1 + i)^n -1)/i

50000 = payment(1.01^240 - 1)/.01

payment = 50.54 per month.

c) so you are depositing every month for 10 years, then letting it "ride" for the next 10 years ?

50000 = [payment(1.01^120 - 1)/.01](1.01^120

50000 = payment(230.0386895)(3.300386895)

payment = 65.56

- personal finance -
**drwls**, Wednesday, March 17, 2010 at 11:43pmI didn't read the problem carefully, and assumed interest compounded annually.

Kudos to Reiny for doing it right, and knowing the formula for (b).

**Answer this Question**

**Related Questions**

finance - You have found three investment choices for a one year deposit: 10% ...

Math - If you finance $50,000 of the purchase of your new home at 4.40% ...

matttth help please - 1. Mike wants to invest money every month for 40 years. ...

Math Personal Finance - Assume an investment of $7000 earns an APR (Annual ...

Finance - Annuities - You have just graduated from the MBA program and to reward...

Math Personal Finance - What is the present value of an investment that will be ...

personal finance - in this problem: if you wanted to put aside $2,000 a year for...

Math Personal Finance - What is the present value of an investment that will be ...

Finance Help! 3 questions - Hi, i was wondering if someone could please help me ...

finance (saving for $1,000,000) - At age 5, how much would you have to save per ...