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Finding the Third Proportional to 31,293 and 68,391

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Solution

The third proportional to 31,293 and 68,391 is: 149,468.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,293 : 68,391 = 68,391 : x
  2. Step 2: Convert to fraction form
    31,293/68,391 = 68,391/x
  3. Step 3: Cross multiply
    31,293x = 68,391 × 68,391
  4. Step 4: Simplify right side
    31,293x = 4,677,328,881
  5. Step 5: Solve for x
    x = 4,677,328,881/31,293
  6. Step 6: Final answer
    x = 149,468.86

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.