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Finding the Fourth Proportional to 80,372.70, 120,559.98 and 38,256.72

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Solution

The fourth proportional to 80,372.70, 120,559.98 and 38,256.72 is: 57,385.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,372.70 : 120,559.98 = 38,256.72 : x
  2. Step 2: Convert to fraction form
    80,372.70/120,559.98 = 38,256.72/x
  3. Step 3: Cross multiply
    80,372.70x = 120,559.98 × 38,256.72
  4. Step 4: Simplify right side
    80,372.70x = 4,612,229,398.07
  5. Step 5: Solve for x
    x = 4,612,229,398.07/80,372.70
  6. Step 6: Final answer
    x = 57,385.52

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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.