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Finding the Fourth Proportional to 101,414.88, 139,909.68 and 67,891.68

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Solution

The fourth proportional to 101,414.88, 139,909.68 and 67,891.68 is: 93,661.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,414.88 : 139,909.68 = 67,891.68 : x
  2. Step 2: Convert to fraction form
    101,414.88/139,909.68 = 67,891.68/x
  3. Step 3: Cross multiply
    101,414.88x = 139,909.68 × 67,891.68
  4. Step 4: Simplify right side
    101,414.88x = 9,498,703,223.46
  5. Step 5: Solve for x
    x = 9,498,703,223.46/101,414.88
  6. Step 6: Final answer
    x = 93,661.83

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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.