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Finding the Fourth Proportional to 80,937.52, 121,481.14 and 40,984.60

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Solution

The fourth proportional to 80,937.52, 121,481.14 and 40,984.60 is: 61,514.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,937.52 : 121,481.14 = 40,984.60 : x
  2. Step 2: Convert to fraction form
    80,937.52/121,481.14 = 40,984.60/x
  3. Step 3: Cross multiply
    80,937.52x = 121,481.14 × 40,984.60
  4. Step 4: Simplify right side
    80,937.52x = 4,978,855,930.44
  5. Step 5: Solve for x
    x = 4,978,855,930.44/80,937.52
  6. Step 6: Final answer
    x = 61,514.81

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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.