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Finding the Third Proportional to 137,631 and 212,711

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Solution

The third proportional to 137,631 and 212,711 is: 328,748.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,631 : 212,711 = 212,711 : x
  2. Step 2: Convert to fraction form
    137,631/212,711 = 212,711/x
  3. Step 3: Cross multiply
    137,631x = 212,711 × 212,711
  4. Step 4: Simplify right side
    137,631x = 45,245,969,521
  5. Step 5: Solve for x
    x = 45,245,969,521/137,631
  6. Step 6: Final answer
    x = 328,748.39

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.