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Finding the Third Proportional to 31,205 and 66,874

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Solution

The third proportional to 31,205 and 66,874 is: 143,314.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,205 : 66,874 = 66,874 : x
  2. Step 2: Convert to fraction form
    31,205/66,874 = 66,874/x
  3. Step 3: Cross multiply
    31,205x = 66,874 × 66,874
  4. Step 4: Simplify right side
    31,205x = 4,472,131,876
  5. Step 5: Solve for x
    x = 4,472,131,876/31,205
  6. Step 6: Final answer
    x = 143,314.59

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.