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Finding the Fourth Proportional to 129,053.43, 178,122.17 and 71,712.42

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Solution

The fourth proportional to 129,053.43, 178,122.17 and 71,712.42 is: 98,978.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,053.43 : 178,122.17 = 71,712.42 : x
  2. Step 2: Convert to fraction form
    129,053.43/178,122.17 = 71,712.42/x
  3. Step 3: Cross multiply
    129,053.43x = 178,122.17 × 71,712.42
  4. Step 4: Simplify right side
    129,053.43x = 12,773,571,866.35
  5. Step 5: Solve for x
    x = 12,773,571,866.35/129,053.43
  6. Step 6: Final answer
    x = 98,978.94

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