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Finding the Fourth Proportional to 80,305.92, 120,447.95 and 21,136.64

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Solution

The fourth proportional to 80,305.92, 120,447.95 and 21,136.64 is: 31,702.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,305.92 : 120,447.95 = 21,136.64 : x
  2. Step 2: Convert to fraction form
    80,305.92/120,447.95 = 21,136.64/x
  3. Step 3: Cross multiply
    80,305.92x = 120,447.95 × 21,136.64
  4. Step 4: Simplify right side
    80,305.92x = 2,545,864,249.97
  5. Step 5: Solve for x
    x = 2,545,864,249.97/80,305.92
  6. Step 6: Final answer
    x = 31,702.07

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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.