1. **State the problem:** A cyclist rode 154.8 kilometers in 4 hours at a steady speed. We need to find the speed in kilometers per hour. 2. **Recall the formula for speed:** Speed is distance divided by time. 3. **Apply the formula:** $$\text{Speed} = \frac{\text{Distance}}{\text{Time}} = \frac{154.8}{4}$$ 4. **Calculate the speed:** $$\frac{154.8}{4} = 38.7$$ 5. **Interpret the result:** The cyclist rode at a speed of 38.7 kilometers per hour.