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Finding the Fourth Proportional to 80,791.76, 121,206.87 and 40,712.27

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Solution

The fourth proportional to 80,791.76, 121,206.87 and 40,712.27 is: 61,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,791.76 : 121,206.87 = 40,712.27 : x
  2. Step 2: Convert to fraction form
    80,791.76/121,206.87 = 40,712.27/x
  3. Step 3: Cross multiply
    80,791.76x = 121,206.87 × 40,712.27
  4. Step 4: Simplify right side
    80,791.76x = 4,934,606,211.26
  5. Step 5: Solve for x
    x = 4,934,606,211.26/80,791.76
  6. Step 6: Final answer
    x = 61,078.09

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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.