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Finding the Third Proportional to 129,112 and 279,680

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Solution

The third proportional to 129,112 and 279,680 is: 605,837.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,112 : 279,680 = 279,680 : x
  2. Step 2: Convert to fraction form
    129,112/279,680 = 279,680/x
  3. Step 3: Cross multiply
    129,112x = 279,680 × 279,680
  4. Step 4: Simplify right side
    129,112x = 78,220,902,400
  5. Step 5: Solve for x
    x = 78,220,902,400/129,112
  6. Step 6: Final answer
    x = 605,837.59

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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.