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Finding the Third Proportional to 30,791 and 66,293

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Solution

The third proportional to 30,791 and 66,293 is: 142,728.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,791 : 66,293 = 66,293 : x
  2. Step 2: Convert to fraction form
    30,791/66,293 = 66,293/x
  3. Step 3: Cross multiply
    30,791x = 66,293 × 66,293
  4. Step 4: Simplify right side
    30,791x = 4,394,761,849
  5. Step 5: Solve for x
    x = 4,394,761,849/30,791
  6. Step 6: Final answer
    x = 142,728.78

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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.