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Finding the Third Proportional to 129,631 and 211,674

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Solution

The third proportional to 129,631 and 211,674 is: 345,641.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,631 : 211,674 = 211,674 : x
  2. Step 2: Convert to fraction form
    129,631/211,674 = 211,674/x
  3. Step 3: Cross multiply
    129,631x = 211,674 × 211,674
  4. Step 4: Simplify right side
    129,631x = 44,805,882,276
  5. Step 5: Solve for x
    x = 44,805,882,276/129,631
  6. Step 6: Final answer
    x = 345,641.72

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.