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Finding the Fourth Proportional to 68,669.92, 102,978.96 and 31,708

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Solution

The fourth proportional to 68,669.92, 102,978.96 and 31,708 is: 47,550.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,669.92 : 102,978.96 = 31,708 : x
  2. Step 2: Convert to fraction form
    68,669.92/102,978.96 = 31,708/x
  3. Step 3: Cross multiply
    68,669.92x = 102,978.96 × 31,708
  4. Step 4: Simplify right side
    68,669.92x = 3,265,256,863.68
  5. Step 5: Solve for x
    x = 3,265,256,863.68/68,669.92
  6. Step 6: Final answer
    x = 47,550.03

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