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Finding the Fourth Proportional to 101,229.38, 139,692.77 and 55,906.39

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Solution

The fourth proportional to 101,229.38, 139,692.77 and 55,906.39 is: 77,148.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,229.38 : 139,692.77 = 55,906.39 : x
  2. Step 2: Convert to fraction form
    101,229.38/139,692.77 = 55,906.39/x
  3. Step 3: Cross multiply
    101,229.38x = 139,692.77 × 55,906.39
  4. Step 4: Simplify right side
    101,229.38x = 7,809,718,479.80
  5. Step 5: Solve for x
    x = 7,809,718,479.80/101,229.38
  6. Step 6: Final answer
    x = 77,148.73

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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.