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Finding the Fourth Proportional to 80,042.78, 120,059.82 and 40,598.87

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Solution

The fourth proportional to 80,042.78, 120,059.82 and 40,598.87 is: 60,896.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,042.78 : 120,059.82 = 40,598.87 : x
  2. Step 2: Convert to fraction form
    80,042.78/120,059.82 = 40,598.87/x
  3. Step 3: Cross multiply
    80,042.78x = 120,059.82 × 40,598.87
  4. Step 4: Simplify right side
    80,042.78x = 4,874,292,424.10
  5. Step 5: Solve for x
    x = 4,874,292,424.10/80,042.78
  6. Step 6: Final answer
    x = 60,896.09

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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.