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Finding the Third Proportional to 38,889 and 85,311

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Solution

The third proportional to 38,889 and 85,311 is: 187,147.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,889 : 85,311 = 85,311 : x
  2. Step 2: Convert to fraction form
    38,889/85,311 = 85,311/x
  3. Step 3: Cross multiply
    38,889x = 85,311 × 85,311
  4. Step 4: Simplify right side
    38,889x = 7,277,966,721
  5. Step 5: Solve for x
    x = 7,277,966,721/38,889
  6. Step 6: Final answer
    x = 187,147.18

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.