To find \( 27^{4/3} \), we can break it down into two steps using the property of exponents:
- Find the cube root: \( 27^{1/3} = 3 \)
- Raise the result to the 4th power: \( (27^{1/3})^4 = 3^4 = 81 \)
Thus, \( 27^{4/3} = 81 \).
So the correct response is 81.