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Finding the Fourth Proportional to 124,834.40, 187,251.60 and 72,216.80

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Solution

The fourth proportional to 124,834.40, 187,251.60 and 72,216.80 is: 108,325.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,834.40 : 187,251.60 = 72,216.80 : x
  2. Step 2: Convert to fraction form
    124,834.40/187,251.60 = 72,216.80/x
  3. Step 3: Cross multiply
    124,834.40x = 187,251.60 × 72,216.80
  4. Step 4: Simplify right side
    124,834.40x = 13,522,711,346.88
  5. Step 5: Solve for x
    x = 13,522,711,346.88/124,834.40
  6. Step 6: Final answer
    x = 108,325.20

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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.