The ratio of height of a bonsai ficus tree to the height of a full-size ficus trees is 1:9 the bonsai ficus is 6 inches tall what is the height of a full-size ficus?

To solve this relationship simply make them equal to each other and find the correct value to multiply both the top and cotton numbers and solve,

In this case because of the initial ratio of 1:9, if the bonsai ficus is 6 then 54 inches would be the full size.