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Finding the Fourth Proportional to 119,843.92, 165,450.90 and 72,109

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Solution

The fourth proportional to 119,843.92, 165,450.90 and 72,109 is: 99,550.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,843.92 : 165,450.90 = 72,109 : x
  2. Step 2: Convert to fraction form
    119,843.92/165,450.90 = 72,109/x
  3. Step 3: Cross multiply
    119,843.92x = 165,450.90 × 72,109
  4. Step 4: Simplify right side
    119,843.92x = 11,930,498,948.10
  5. Step 5: Solve for x
    x = 11,930,498,948.10/119,843.92
  6. Step 6: Final answer
    x = 99,550.31

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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.