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Finding the Fourth Proportional to 81,898.87, 122,791.31 and 36,281.79

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Solution

The fourth proportional to 81,898.87, 122,791.31 and 36,281.79 is: 54,397.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,898.87 : 122,791.31 = 36,281.79 : x
  2. Step 2: Convert to fraction form
    81,898.87/122,791.31 = 36,281.79/x
  3. Step 3: Cross multiply
    81,898.87x = 122,791.31 × 36,281.79
  4. Step 4: Simplify right side
    81,898.87x = 4,455,088,523.24
  5. Step 5: Solve for x
    x = 4,455,088,523.24/81,898.87
  6. Step 6: Final answer
    x = 54,397.44

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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.