Question

A 4​-ft vertical post casts a 12​-in shadow at the same time a nearby cell phone tower casts a 126​-ft shadow. How tall is the cell phone​ tower?

Answer 1

4 feet / 12 inches = 4 feet / 1 foot = 4/1 = 4, 
and if h is the height of the cell tower, 
h/126 feet = 4 
h = 4 * 126 feet = 504 feet.