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Finding the Fourth Proportional to 119,910.31, 165,481.58 and 68,939.57

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Solution

The fourth proportional to 119,910.31, 165,481.58 and 68,939.57 is: 95,139.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,910.31 : 165,481.58 = 68,939.57 : x
  2. Step 2: Convert to fraction form
    119,910.31/165,481.58 = 68,939.57/x
  3. Step 3: Cross multiply
    119,910.31x = 165,481.58 × 68,939.57
  4. Step 4: Simplify right side
    119,910.31x = 11,408,229,554.17
  5. Step 5: Solve for x
    x = 11,408,229,554.17/119,910.31
  6. Step 6: Final answer
    x = 95,139.69

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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.