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Finding the Fourth Proportional to 261,224.73, 391,837.52 and 71,687.70

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Solution

The fourth proportional to 261,224.73, 391,837.52 and 71,687.70 is: 107,531.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,224.73 : 391,837.52 = 71,687.70 : x
  2. Step 2: Convert to fraction form
    261,224.73/391,837.52 = 71,687.70/x
  3. Step 3: Cross multiply
    261,224.73x = 391,837.52 × 71,687.70
  4. Step 4: Simplify right side
    261,224.73x = 28,089,930,761.72
  5. Step 5: Solve for x
    x = 28,089,930,761.72/261,224.73
  6. Step 6: Final answer
    x = 107,531.67

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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.