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Finding the Fourth Proportional to 124,620.60, 187,125.30 and 72,132.60

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Solution

The fourth proportional to 124,620.60, 187,125.30 and 72,132.60 is: 108,311.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,620.60 : 187,125.30 = 72,132.60 : x
  2. Step 2: Convert to fraction form
    124,620.60/187,125.30 = 72,132.60/x
  3. Step 3: Cross multiply
    124,620.60x = 187,125.30 × 72,132.60
  4. Step 4: Simplify right side
    124,620.60x = 13,497,834,414.78
  5. Step 5: Solve for x
    x = 13,497,834,414.78/124,620.60
  6. Step 6: Final answer
    x = 108,311.42

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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.