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Finding the Third Proportional to 61,803 and 86,391

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Solution

The third proportional to 61,803 and 86,391 is: 120,761.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,803 : 86,391 = 86,391 : x
  2. Step 2: Convert to fraction form
    61,803/86,391 = 86,391/x
  3. Step 3: Cross multiply
    61,803x = 86,391 × 86,391
  4. Step 4: Simplify right side
    61,803x = 7,463,404,881
  5. Step 5: Solve for x
    x = 7,463,404,881/61,803
  6. Step 6: Final answer
    x = 120,761.21

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.