\[\left( 3\frac{1}{3}a^{4}b^{2} \right)^{3} \cdot \left( - 5ab^{4} \right) =\]
\[= \left( \frac{10}{3}a^{4}b^{2} \right)^{3} \cdot \left( - 5ab^{4} \right) =\]
\[= \frac{1000}{27}a^{12}b^{6} \cdot \left( - 5ab^{4} \right) = - \frac{5000}{27}a^{13}b^{10} =\]
\[= - 185\frac{5}{27}a^{13}b^{10}.\]