Ruler Length from Colored Segments

A ruler is divided into four colored segments that together cover its entire length: - A blue segment that is $\frac{1}{4}$ of the ruler's total length - A red segment that is $\frac{1}{5}$ of the ruler's total length - A yellow segment that is $\frac{1}{6}$ of the ruler's total length - A green segment that is exactly 23 units long How long is the ruler?