To find out how much meat the caterer should order for 100 guests based on the information provided, we can start by determining the ratio of meat needed per guest.
The caterer requires 40 pounds of meat for 25 guests:
\[ \text{Meat per guest} = \frac{40 \text{ pounds}}{25 \text{ guests}} = 1.6 \text{ pounds per guest} \]
Now, we can calculate the amount of meat needed for 100 guests:
\[ \text{Meat for 100 guests} = 100 \text{ guests} \times 1.6 \text{ pounds per guest} = 160 \text{ pounds} \]
Thus, the caterer should order 160 pounds of meat for 100 guests.