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Finding the Third Proportional to 51,344 and 78,872

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Solution

The third proportional to 51,344 and 78,872 is: 121,159.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,344 : 78,872 = 78,872 : x
  2. Step 2: Convert to fraction form
    51,344/78,872 = 78,872/x
  3. Step 3: Cross multiply
    51,344x = 78,872 × 78,872
  4. Step 4: Simplify right side
    51,344x = 6,220,792,384
  5. Step 5: Solve for x
    x = 6,220,792,384/51,344
  6. Step 6: Final answer
    x = 121,159.09

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.