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Finding the Fourth Proportional to 80,583.40, 120,863.92 and 21,423.88

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Solution

The fourth proportional to 80,583.40, 120,863.92 and 21,423.88 is: 32,132.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,583.40 : 120,863.92 = 21,423.88 : x
  2. Step 2: Convert to fraction form
    80,583.40/120,863.92 = 21,423.88/x
  3. Step 3: Cross multiply
    80,583.40x = 120,863.92 × 21,423.88
  4. Step 4: Simplify right side
    80,583.40x = 2,589,374,118.41
  5. Step 5: Solve for x
    x = 2,589,374,118.41/80,583.40
  6. Step 6: Final answer
    x = 32,132.85

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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.