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Finding the Fourth Proportional to 87,103, 120,204.57 and 49,379.68

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Solution

The fourth proportional to 87,103, 120,204.57 and 49,379.68 is: 68,145.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,103 : 120,204.57 = 49,379.68 : x
  2. Step 2: Convert to fraction form
    87,103/120,204.57 = 49,379.68/x
  3. Step 3: Cross multiply
    87,103x = 120,204.57 × 49,379.68
  4. Step 4: Simplify right side
    87,103x = 5,935,663,201.14
  5. Step 5: Solve for x
    x = 5,935,663,201.14/87,103
  6. Step 6: Final answer
    x = 68,145.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.