boys : girls = 5 : 4 = 5x : 4x
but 4x = 60, so x = 15
number of boys = 5x = 75
check:
boys:girls = 75:60 = 5 : 4
The ratio of boys and girls are 5 to 4. There are 60 girls how many boys
2 answers
Ratio of boys to girls is 5:4. We could change that to a fraction, which is 5/4.
We now set up a proportion. We will call the unknown number of boys (b):
5/4 = b/60
Solve: (5 x 60)/4 = 300/4 = 75 boys
Check: Since a ratio represents division, we can divide 75 by 60 and 5 by 4. If they are equal, then we have done it correctly.
75/60 = 1.25
5/4 = 1.25
So, there 75 boys.
Hope this helps! :)
We now set up a proportion. We will call the unknown number of boys (b):
5/4 = b/60
Solve: (5 x 60)/4 = 300/4 = 75 boys
Check: Since a ratio represents division, we can divide 75 by 60 and 5 by 4. If they are equal, then we have done it correctly.
75/60 = 1.25
5/4 = 1.25
So, there 75 boys.
Hope this helps! :)