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Finding the Fourth Proportional to 101,229.98, 139,698.42 and 55,909.11

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Solution

The fourth proportional to 101,229.98, 139,698.42 and 55,909.11 is: 77,155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,229.98 : 139,698.42 = 55,909.11 : x
  2. Step 2: Convert to fraction form
    101,229.98/139,698.42 = 55,909.11/x
  3. Step 3: Cross multiply
    101,229.98x = 139,698.42 × 55,909.11
  4. Step 4: Simplify right side
    101,229.98x = 7,810,414,330.61
  5. Step 5: Solve for x
    x = 7,810,414,330.61/101,229.98
  6. Step 6: Final answer
    x = 77,155.15

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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.