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Finding the Fourth Proportional to 101,434.97, 139,936.12 and 61,125.83

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Solution

The fourth proportional to 101,434.97, 139,936.12 and 61,125.83 is: 84,327.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,434.97 : 139,936.12 = 61,125.83 : x
  2. Step 2: Convert to fraction form
    101,434.97/139,936.12 = 61,125.83/x
  3. Step 3: Cross multiply
    101,434.97x = 139,936.12 × 61,125.83
  4. Step 4: Simplify right side
    101,434.97x = 8,553,711,481.98
  5. Step 5: Solve for x
    x = 8,553,711,481.98/101,434.97
  6. Step 6: Final answer
    x = 84,327.05

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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.