Question 135253
We need to set up a relationship between two sets of numbers.

We are told that the relationship is a direct proportion. we are told that "a person 61 inches tall casts a shadow 57 inches long". So we can setup a ratio that relates those two.
{{{61/57}}}

we are also told a tree casts a shadow of 42 feet and then asked to find how tall the tree is.

In words: 61 is to 57 as x is to 42

{{{61/57 = x/42}}}
{{{(61*42)/57 = x }}}
{{{ 50.2feet = x}}}