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Finding the Third Proportional to 81,909 and 179,208

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Solution

The third proportional to 81,909 and 179,208 is: 392,087.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,909 : 179,208 = 179,208 : x
  2. Step 2: Convert to fraction form
    81,909/179,208 = 179,208/x
  3. Step 3: Cross multiply
    81,909x = 179,208 × 179,208
  4. Step 4: Simplify right side
    81,909x = 32,115,507,264
  5. Step 5: Solve for x
    x = 32,115,507,264/81,909
  6. Step 6: Final answer
    x = 392,087.65

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.