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Finding the Third Proportional to 128,418 and 170,397

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Solution

The third proportional to 128,418 and 170,397 is: 226,098.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,418 : 170,397 = 170,397 : x
  2. Step 2: Convert to fraction form
    128,418/170,397 = 170,397/x
  3. Step 3: Cross multiply
    128,418x = 170,397 × 170,397
  4. Step 4: Simplify right side
    128,418x = 29,035,137,609
  5. Step 5: Solve for x
    x = 29,035,137,609/128,418
  6. Step 6: Final answer
    x = 226,098.66

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.