Apples cost $4 for 5lbs. How much will 40 lbs.of apples cost? (Set up a proportion and solve it)

4/5 = x/50

4/5 = x/40

To set up a proportion, we can compare the cost to the weight of the apples.

Let's assume x represents the cost of 40 lbs. of apples.

We can set up the proportion as follows:

$4 for 5 lbs = x for 40 lbs

This can be written as:

4/5 = x/40

To solve for x, we can cross multiply:

4 * 40 = 5 * x

Simplifying the equation, we have:

160 = 5x

To isolate x, we need to divide both sides of the equation by 5:

160 / 5 = 5x / 5

This gives us:

32 = x

So, 40 lbs of apples will cost $32.