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Finding the Fourth Proportional to 81,558, 122,354.60 and 25,396.96

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Solution

The fourth proportional to 81,558, 122,354.60 and 25,396.96 is: 38,100.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,558 : 122,354.60 = 25,396.96 : x
  2. Step 2: Convert to fraction form
    81,558/122,354.60 = 25,396.96/x
  3. Step 3: Cross multiply
    81,558x = 122,354.60 × 25,396.96
  4. Step 4: Simplify right side
    81,558x = 3,107,434,882.02
  5. Step 5: Solve for x
    x = 3,107,434,882.02/81,558
  6. Step 6: Final answer
    x = 38,100.92

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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.