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Finding the Fourth Proportional to 423,658.49, 635,487.20 and 108,115.40

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Solution

The fourth proportional to 423,658.49, 635,487.20 and 108,115.40 is: 162,172.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,658.49 : 635,487.20 = 108,115.40 : x
  2. Step 2: Convert to fraction form
    423,658.49/635,487.20 = 108,115.40/x
  3. Step 3: Cross multiply
    423,658.49x = 635,487.20 × 108,115.40
  4. Step 4: Simplify right side
    423,658.49x = 68,705,949,104.87
  5. Step 5: Solve for x
    x = 68,705,949,104.87/423,658.49
  6. Step 6: Final answer
    x = 162,172.96

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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.