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Finding the Fourth Proportional to 128,553.92, 192,498.60 and 88,695.80

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Solution

The fourth proportional to 128,553.92, 192,498.60 and 88,695.80 is: 132,814.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,553.92 : 192,498.60 = 88,695.80 : x
  2. Step 2: Convert to fraction form
    128,553.92/192,498.60 = 88,695.80/x
  3. Step 3: Cross multiply
    128,553.92x = 192,498.60 × 88,695.80
  4. Step 4: Simplify right side
    128,553.92x = 17,073,817,325.88
  5. Step 5: Solve for x
    x = 17,073,817,325.88/128,553.92
  6. Step 6: Final answer
    x = 132,814.44

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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.