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Finding the Fourth Proportional to 172,609.35, 258,939.54 and 88,417.14

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Solution

The fourth proportional to 172,609.35, 258,939.54 and 88,417.14 is: 132,638.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,609.35 : 258,939.54 = 88,417.14 : x
  2. Step 2: Convert to fraction form
    172,609.35/258,939.54 = 88,417.14/x
  3. Step 3: Cross multiply
    172,609.35x = 258,939.54 × 88,417.14
  4. Step 4: Simplify right side
    172,609.35x = 22,894,693,559.72
  5. Step 5: Solve for x
    x = 22,894,693,559.72/172,609.35
  6. Step 6: Final answer
    x = 132,638.78

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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.