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Finding the Third Proportional to 61,398 and 86,859

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Solution

The third proportional to 61,398 and 86,859 is: 122,878.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,398 : 86,859 = 86,859 : x
  2. Step 2: Convert to fraction form
    61,398/86,859 = 86,859/x
  3. Step 3: Cross multiply
    61,398x = 86,859 × 86,859
  4. Step 4: Simplify right side
    61,398x = 7,544,485,881
  5. Step 5: Solve for x
    x = 7,544,485,881/61,398
  6. Step 6: Final answer
    x = 122,878.37

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.