Finding the Third Proportional to 67.75 and 140.25

Step by Step Solution

1. Step 1: Write the proportion equation
   67.75 : 140.25 = 140.25 : x
2. Step 2: Convert to fraction form
   67.75/140.25 = 140.25/x
3. Step 3: Cross multiply
   67.75x = 140.25 × 140.25
4. Step 4: Simplify right side
   67.75x = 19,670.06
5. Step 5: Solve for x
   x = 19,670.06/67.75
6. Step 6: Final answer
   x = 290.33