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Finding the Fourth Proportional to 81,651.95, 122,494.48 and 25,489.79

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Solution

The fourth proportional to 81,651.95, 122,494.48 and 25,489.79 is: 38,239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,651.95 : 122,494.48 = 25,489.79 : x
  2. Step 2: Convert to fraction form
    81,651.95/122,494.48 = 25,489.79/x
  3. Step 3: Cross multiply
    81,651.95x = 122,494.48 × 25,489.79
  4. Step 4: Simplify right side
    81,651.95x = 3,122,358,354.52
  5. Step 5: Solve for x
    x = 3,122,358,354.52/81,651.95
  6. Step 6: Final answer
    x = 38,239.85

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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.