Step 1: Formula for acceleration due to gravity at a height \(h\) from Earth's surface.
The acceleration due to gravity at a height \(h\) is given by:
\[
g_h = g \left( \frac{R}{R + h} \right)^2,
\]
where:
\(g_h\): Acceleration due to gravity at height \(h\),
\(g\): Acceleration due to gravity on the surface of the Earth,
\(R\): Radius of the Earth.
Step 2: Setting \(g_h = \frac{g}{4}\).
Substitute \(g_h = \frac{g}{4}\) into the equation:
\[
\frac{g}{4} = g \left( \frac{R}{R + h} \right)^2.
\]
Step 3: Simplifying the equation.
Cancel \(g\) from both sides:
\[
\frac{1}{4} = \left( \frac{R}{R + h} \right)^2.
\]
Take the square root of both sides:
\[
\frac{1}{2} = \frac{R}{R + h}.
\]
Cross-multiply:
\[
R + h = 2R.
\]
Step 4: Solve for \(h\).
\[
h = 2R - R = R.
\]
Step 5: Conclusion.
The height from Earth's surface at which acceleration due to gravity becomes \(\frac{g}{4}\) is:
\[
\boxed{R}.
\]