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Finding the Third Proportional to 78,609 and 170,508

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Solution

The third proportional to 78,609 and 170,508 is: 369,842.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,609 : 170,508 = 170,508 : x
  2. Step 2: Convert to fraction form
    78,609/170,508 = 170,508/x
  3. Step 3: Cross multiply
    78,609x = 170,508 × 170,508
  4. Step 4: Simplify right side
    78,609x = 29,072,978,064
  5. Step 5: Solve for x
    x = 29,072,978,064/78,609
  6. Step 6: Final answer
    x = 369,842.87

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.