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Finding the Fourth Proportional to 81,859.26, 122,788.89 and 29,265.57

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Solution

The fourth proportional to 81,859.26, 122,788.89 and 29,265.57 is: 43,898.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,859.26 : 122,788.89 = 29,265.57 : x
  2. Step 2: Convert to fraction form
    81,859.26/122,788.89 = 29,265.57/x
  3. Step 3: Cross multiply
    81,859.26x = 122,788.89 × 29,265.57
  4. Step 4: Simplify right side
    81,859.26x = 3,593,486,855.52
  5. Step 5: Solve for x
    x = 3,593,486,855.52/81,859.26
  6. Step 6: Final answer
    x = 43,898.36

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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.