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Finding the Fourth Proportional to 502,105.92, 753,158.40 and 128,128.92

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Solution

The fourth proportional to 502,105.92, 753,158.40 and 128,128.92 is: 192,193.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,105.92 : 753,158.40 = 128,128.92 : x
  2. Step 2: Convert to fraction form
    502,105.92/753,158.40 = 128,128.92/x
  3. Step 3: Cross multiply
    502,105.92x = 753,158.40 × 128,128.92
  4. Step 4: Simplify right side
    502,105.92x = 96,501,372,380.93
  5. Step 5: Solve for x
    x = 96,501,372,380.93/502,105.92
  6. Step 6: Final answer
    x = 192,193.26

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Double scale
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Similar ratio
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1.5x scale

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.