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Finding the Fourth Proportional to 80,454.35, 120,687.29 and 21,289.32

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Solution

The fourth proportional to 80,454.35, 120,687.29 and 21,289.32 is: 31,935.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,454.35 : 120,687.29 = 21,289.32 : x
  2. Step 2: Convert to fraction form
    80,454.35/120,687.29 = 21,289.32/x
  3. Step 3: Cross multiply
    80,454.35x = 120,687.29 × 21,289.32
  4. Step 4: Simplify right side
    80,454.35x = 2,569,350,230.30
  5. Step 5: Solve for x
    x = 2,569,350,230.30/80,454.35
  6. Step 6: Final answer
    x = 31,935.51

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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.