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Finding the Third Proportional to 78,867 and 172,302

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Solution

The third proportional to 78,867 and 172,302 is: 376,430.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,867 : 172,302 = 172,302 : x
  2. Step 2: Convert to fraction form
    78,867/172,302 = 172,302/x
  3. Step 3: Cross multiply
    78,867x = 172,302 × 172,302
  4. Step 4: Simplify right side
    78,867x = 29,687,979,204
  5. Step 5: Solve for x
    x = 29,687,979,204/78,867
  6. Step 6: Final answer
    x = 376,430.94

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.