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Finding the Fourth Proportional to 138,193.39, 206,957.90 and 78,849.15

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Solution

The fourth proportional to 138,193.39, 206,957.90 and 78,849.15 is: 118,084.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,193.39 : 206,957.90 = 78,849.15 : x
  2. Step 2: Convert to fraction form
    138,193.39/206,957.90 = 78,849.15/x
  3. Step 3: Cross multiply
    138,193.39x = 206,957.90 × 78,849.15
  4. Step 4: Simplify right side
    138,193.39x = 16,318,453,921.82
  5. Step 5: Solve for x
    x = 16,318,453,921.82/138,193.39
  6. Step 6: Final answer
    x = 118,084.18

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