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Finding the Third Proportional to 38,821 and 86,391

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Solution

The third proportional to 38,821 and 86,391 is: 192,251.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,821 : 86,391 = 86,391 : x
  2. Step 2: Convert to fraction form
    38,821/86,391 = 86,391/x
  3. Step 3: Cross multiply
    38,821x = 86,391 × 86,391
  4. Step 4: Simplify right side
    38,821x = 7,463,404,881
  5. Step 5: Solve for x
    x = 7,463,404,881/38,821
  6. Step 6: Final answer
    x = 192,251.74

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.