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Finding the Fourth Proportional to 123,708.87, 185,472.47 and 39,420.52

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Solution

The fourth proportional to 123,708.87, 185,472.47 and 39,420.52 is: 59,101.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,708.87 : 185,472.47 = 39,420.52 : x
  2. Step 2: Convert to fraction form
    123,708.87/185,472.47 = 39,420.52/x
  3. Step 3: Cross multiply
    123,708.87x = 185,472.47 × 39,420.52
  4. Step 4: Simplify right side
    123,708.87x = 7,311,420,847.95
  5. Step 5: Solve for x
    x = 7,311,420,847.95/123,708.87
  6. Step 6: Final answer
    x = 59,101.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.