The sum of the ratios is 10 . Since the sum of the angles of a triangle is $180^{\circ}$, the ratio can be scaled up to $54: 54: 72(3 \cdot 18: 3 \cdot 18: 4 \cdot 18)$. The numbers in the ratio $54: 54: 72$ represent the angles of the triangle. The question asks for the largest, so the answer is 
If the degree measures of the angles of a triangle are in the ratio $3: 3: 4$, what is the degree measure of the largest angle of the triangle? 

A) $$18$$ 
B) $$36$$ 
C) $$60$$ 
D) $$72$$ 