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Finding the Fourth Proportional to 80,468.43, 120,702.65 and 42,914.73

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Solution

The fourth proportional to 80,468.43, 120,702.65 and 42,914.73 is: 64,372.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,468.43 : 120,702.65 = 42,914.73 : x
  2. Step 2: Convert to fraction form
    80,468.43/120,702.65 = 42,914.73/x
  3. Step 3: Cross multiply
    80,468.43x = 120,702.65 × 42,914.73
  4. Step 4: Simplify right side
    80,468.43x = 5,179,921,420.46
  5. Step 5: Solve for x
    x = 5,179,921,420.46/80,468.43
  6. Step 6: Final answer
    x = 64,372.10

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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.