Finding the Third Proportional to 78.75 and 154.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78.75 : 154.75 = 154.75 : x
2. Step 2: Convert to fraction form
   78.75/154.75 = 154.75/x
3. Step 3: Cross multiply
   78.75x = 154.75 × 154.75
4. Step 4: Simplify right side
   78.75x = 23,947.56
5. Step 5: Solve for x
   x = 23,947.56/78.75
6. Step 6: Final answer
   x = 304.10