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Finding the Fourth Proportional to 80,614.89, 120,922.17 and 21,450.57

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Solution

The fourth proportional to 80,614.89, 120,922.17 and 21,450.57 is: 32,175.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,614.89 : 120,922.17 = 21,450.57 : x
  2. Step 2: Convert to fraction form
    80,614.89/120,922.17 = 21,450.57/x
  3. Step 3: Cross multiply
    80,614.89x = 120,922.17 × 21,450.57
  4. Step 4: Simplify right side
    80,614.89x = 2,593,849,472.14
  5. Step 5: Solve for x
    x = 2,593,849,472.14/80,614.89
  6. Step 6: Final answer
    x = 32,175.81

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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.