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Finding the Fourth Proportional to 124,792.88, 187,276.80 and 72,129.92

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Solution

The fourth proportional to 124,792.88, 187,276.80 and 72,129.92 is: 108,245.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,792.88 : 187,276.80 = 72,129.92 : x
  2. Step 2: Convert to fraction form
    124,792.88/187,276.80 = 72,129.92/x
  3. Step 3: Cross multiply
    124,792.88x = 187,276.80 × 72,129.92
  4. Step 4: Simplify right side
    124,792.88x = 13,508,260,601.86
  5. Step 5: Solve for x
    x = 13,508,260,601.86/124,792.88
  6. Step 6: Final answer
    x = 108,245.44

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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.