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Finding the Third Proportional to 31,763 and 68,311

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Solution

The third proportional to 31,763 and 68,311 is: 146,912.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,763 : 68,311 = 68,311 : x
  2. Step 2: Convert to fraction form
    31,763/68,311 = 68,311/x
  3. Step 3: Cross multiply
    31,763x = 68,311 × 68,311
  4. Step 4: Simplify right side
    31,763x = 4,666,392,721
  5. Step 5: Solve for x
    x = 4,666,392,721/31,763
  6. Step 6: Final answer
    x = 146,912.85

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.