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Finding the Fourth Proportional to 80,565.30, 120,839.42 and 21,406.94

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Solution

The fourth proportional to 80,565.30, 120,839.42 and 21,406.94 is: 32,108.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,565.30 : 120,839.42 = 21,406.94 : x
  2. Step 2: Convert to fraction form
    80,565.30/120,839.42 = 21,406.94/x
  3. Step 3: Cross multiply
    80,565.30x = 120,839.42 × 21,406.94
  4. Step 4: Simplify right side
    80,565.30x = 2,586,802,213.57
  5. Step 5: Solve for x
    x = 2,586,802,213.57/80,565.30
  6. Step 6: Final answer
    x = 32,108.14

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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.