The length and width of the new scale drawing is 36 inches and 24 inches respectively.
The given parameters:
The original length and width of the soccer field is calculated as follows;
1 inch : 12 yards
For the new scale of 1 inch : 3 yards, the new length and width are represented as;
the new width:
[tex]\frac{1 \ inch}{x} = \frac{3 \ yards}{72 \ yards} \\\\x = 24 \ inches[/tex]
the new length:
[tex]\frac{1 \ inch}{x} = \frac{3 \ yards}{108 \ yards} \\\\x = 36\ inches[/tex]
Thus, the length and width of the new scale drawing is 36 inches and 24 inches respectively.
Learn more about scale drawing here: