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Finding the Third Proportional to 31,899 and 68,672.63

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Solution

The third proportional to 31,899 and 68,672.63 is: 147,839.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,899 : 68,672.63 = 68,672.63 : x
  2. Step 2: Convert to fraction form
    31,899/68,672.63 = 68,672.63/x
  3. Step 3: Cross multiply
    31,899x = 68,672.63 × 68,672.63
  4. Step 4: Simplify right side
    31,899x = 4,715,929,424.39
  5. Step 5: Solve for x
    x = 4,715,929,424.39/31,899
  6. Step 6: Final answer
    x = 147,839.41

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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.