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Finding the Third Proportional to 79,721 and 169,162

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Solution

The third proportional to 79,721 and 169,162 is: 358,949.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,721 : 169,162 = 169,162 : x
  2. Step 2: Convert to fraction form
    79,721/169,162 = 169,162/x
  3. Step 3: Cross multiply
    79,721x = 169,162 × 169,162
  4. Step 4: Simplify right side
    79,721x = 28,615,782,244
  5. Step 5: Solve for x
    x = 28,615,782,244/79,721
  6. Step 6: Final answer
    x = 358,949.11

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.