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Finding the Fourth Proportional to 81,491.60, 122,254.70 and 25,330.34

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Solution

The fourth proportional to 81,491.60, 122,254.70 and 25,330.34 is: 38,000.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,491.60 : 122,254.70 = 25,330.34 : x
  2. Step 2: Convert to fraction form
    81,491.60/122,254.70 = 25,330.34/x
  3. Step 3: Cross multiply
    81,491.60x = 122,254.70 × 25,330.34
  4. Step 4: Simplify right side
    81,491.60x = 3,096,752,379.67
  5. Step 5: Solve for x
    x = 3,096,752,379.67/81,491.60
  6. Step 6: Final answer
    x = 38,000.88

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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.