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Finding the Third Proportional to 31,156.50 and 66,207.75

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Solution

The third proportional to 31,156.50 and 66,207.75 is: 140,691.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,156.50 : 66,207.75 = 66,207.75 : x
  2. Step 2: Convert to fraction form
    31,156.50/66,207.75 = 66,207.75/x
  3. Step 3: Cross multiply
    31,156.50x = 66,207.75 × 66,207.75
  4. Step 4: Simplify right side
    31,156.50x = 4,383,466,160.06
  5. Step 5: Solve for x
    x = 4,383,466,160.06/31,156.50
  6. Step 6: Final answer
    x = 140,691.87

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.