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Finding the Third Proportional to 66,989 and 140,872

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Solution

The third proportional to 66,989 and 140,872 is: 296,241.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,989 : 140,872 = 140,872 : x
  2. Step 2: Convert to fraction form
    66,989/140,872 = 140,872/x
  3. Step 3: Cross multiply
    66,989x = 140,872 × 140,872
  4. Step 4: Simplify right side
    66,989x = 19,844,920,384
  5. Step 5: Solve for x
    x = 19,844,920,384/66,989
  6. Step 6: Final answer
    x = 296,241.48

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.