### Finding solution of expression with fractional power

I'm trying to solve this equation

$ 3(2.2+(\frac{64}{r})^{(1/3)})= 4(2.2+(\frac{128}{r-1})^{(1/4)})$ using solve function

I want to obtain the numerical solution

**but when i use **`sol[0].n(30)`

**TypeError:** cannot evaluate symbolic expression numerically

**when i try to **`find_root(0,1,r)`

**ValueError:** negative number to a fractional power not real

How to find the solution of this expression ?