To find out how far the Johnson family will travel in 5 hours, we first need to determine their speed. They traveled 195 miles in 3 hours, so we can calculate the speed as follows:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} = \frac{195 \text{ miles}}{3 \text{ hours}} = 65 \text{ miles per hour} \]
Now that we know their speed is 65 miles per hour, we can calculate the distance they will travel in 5 hours:
\[ \text{Distance} = \text{Speed} \times \text{Time} = 65 \text{ miles per hour} \times 5 \text{ hours} = 325 \text{ miles} \]
Thus, the Johnson family will travel 325 miles in 5 hours.