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Finding the Third Proportional to 78,831 and 170,775

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Solution

The third proportional to 78,831 and 170,775 is: 369,957.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,831 : 170,775 = 170,775 : x
  2. Step 2: Convert to fraction form
    78,831/170,775 = 170,775/x
  3. Step 3: Cross multiply
    78,831x = 170,775 × 170,775
  4. Step 4: Simplify right side
    78,831x = 29,164,100,625
  5. Step 5: Solve for x
    x = 29,164,100,625/78,831
  6. Step 6: Final answer
    x = 369,957.26

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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.