Posted by **lovecaandy** on Wednesday, March 23, 2011 at 5:49pm.

If a 4th grade with 140 students has 3 boys for every 4 girls how many are girls? how many are boys?

- math -
**Ms. Sue**, Wednesday, March 23, 2011 at 6:06pm
Set up a proportion and cross multiply. Let x = the number of boys

3/7 = x/140

7x = 420

x = 60

- math -
**kate**, Wednesday, March 23, 2011 at 6:14pm
try (20*4)+(20*3)

- math -
**mar**, Wednesday, March 23, 2011 at 9:58pm
there are 80 fourth graders in school of these, 35 were boys. what fractional part of the fourth graders were girls

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