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Finding the Third Proportional to 31,542 and 68,988

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Solution

The third proportional to 31,542 and 68,988 is: 150,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,542 : 68,988 = 68,988 : x
  2. Step 2: Convert to fraction form
    31,542/68,988 = 68,988/x
  3. Step 3: Cross multiply
    31,542x = 68,988 × 68,988
  4. Step 4: Simplify right side
    31,542x = 4,759,344,144
  5. Step 5: Solve for x
    x = 4,759,344,144/31,542
  6. Step 6: Final answer
    x = 150,889.10

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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.