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Finding the Fourth Proportional to 139,951,712.52, 193,171,776.04 and 81,233,294.41

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Solution

The fourth proportional to 139,951,712.52, 193,171,776.04 and 81,233,294.41 is: 112,124,242.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,951,712.52 : 193,171,776.04 = 81,233,294.41 : x
  2. Step 2: Convert to fraction form
    139,951,712.52/193,171,776.04 = 81,233,294.41/x
  3. Step 3: Cross multiply
    139,951,712.52x = 193,171,776.04 × 81,233,294.41
  4. Step 4: Simplify right side
    139,951,712.52x = 15,691,979,755,102,908
  5. Step 5: Solve for x
    x = 15,691,979,755,102,908/139,951,712.52
  6. Step 6: Final answer
    x = 112,124,242.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.