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Finding the Fourth Proportional to 80,374.62, 120,552.66 and 21,214.91

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Solution

The fourth proportional to 80,374.62, 120,552.66 and 21,214.91 is: 31,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,374.62 : 120,552.66 = 21,214.91 : x
  2. Step 2: Convert to fraction form
    80,374.62/120,552.66 = 21,214.91/x
  3. Step 3: Cross multiply
    80,374.62x = 120,552.66 × 21,214.91
  4. Step 4: Simplify right side
    80,374.62x = 2,557,513,832.16
  5. Step 5: Solve for x
    x = 2,557,513,832.16/80,374.62
  6. Step 6: Final answer
    x = 31,819.92

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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.