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Finding the Fourth Proportional to 80,398.87, 120,616.68 and 27,808.31

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Solution

The fourth proportional to 80,398.87, 120,616.68 and 27,808.31 is: 41,718.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,398.87 : 120,616.68 = 27,808.31 : x
  2. Step 2: Convert to fraction form
    80,398.87/120,616.68 = 27,808.31/x
  3. Step 3: Cross multiply
    80,398.87x = 120,616.68 × 27,808.31
  4. Step 4: Simplify right side
    80,398.87x = 3,354,146,028.61
  5. Step 5: Solve for x
    x = 3,354,146,028.61/80,398.87
  6. Step 6: Final answer
    x = 41,718.82

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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.