Help on proportional math with fractins and decimals.

A) 120 over 3/7=7 over x
B)4.5 over 120 = 0.9 over x
how to solve this need answer for daughter.

A.) 120 / (3/7) = 7 / x
120x = 7(3/7)
120x = 3
x = 3 / 120
x = 1/40
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B.) 4.5 / 120 = 0.9 / x
4.5x = 120(0.9)
4.5 x = 108
x = 108 / 4.5
x = 24
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