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Finding the Third Proportional to 86,959 and 138,328

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Solution

The third proportional to 86,959 and 138,328 is: 220,042.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,959 : 138,328 = 138,328 : x
  2. Step 2: Convert to fraction form
    86,959/138,328 = 138,328/x
  3. Step 3: Cross multiply
    86,959x = 138,328 × 138,328
  4. Step 4: Simplify right side
    86,959x = 19,134,635,584
  5. Step 5: Solve for x
    x = 19,134,635,584/86,959
  6. Step 6: Final answer
    x = 220,042.04

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.