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Finding the Third Proportional to 31,560 and 68,376

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Solution

The third proportional to 31,560 and 68,376 is: 148,139.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,560 : 68,376 = 68,376 : x
  2. Step 2: Convert to fraction form
    31,560/68,376 = 68,376/x
  3. Step 3: Cross multiply
    31,560x = 68,376 × 68,376
  4. Step 4: Simplify right side
    31,560x = 4,675,277,376
  5. Step 5: Solve for x
    x = 4,675,277,376/31,560
  6. Step 6: Final answer
    x = 148,139.33

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.