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Finding the Fourth Proportional to 80,610.98, 120,916.28 and 21,446.66

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Solution

The fourth proportional to 80,610.98, 120,916.28 and 21,446.66 is: 32,169.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,610.98 : 120,916.28 = 21,446.66 : x
  2. Step 2: Convert to fraction form
    80,610.98/120,916.28 = 21,446.66/x
  3. Step 3: Cross multiply
    80,610.98x = 120,916.28 × 21,446.66
  4. Step 4: Simplify right side
    80,610.98x = 2,593,250,345.62
  5. Step 5: Solve for x
    x = 2,593,250,345.62/80,610.98
  6. Step 6: Final answer
    x = 32,169.94

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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.