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Finding the Third Proportional to 55,538 and 86,021

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Solution

The third proportional to 55,538 and 86,021 is: 133,235.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,538 : 86,021 = 86,021 : x
  2. Step 2: Convert to fraction form
    55,538/86,021 = 86,021/x
  3. Step 3: Cross multiply
    55,538x = 86,021 × 86,021
  4. Step 4: Simplify right side
    55,538x = 7,399,612,441
  5. Step 5: Solve for x
    x = 7,399,612,441/55,538
  6. Step 6: Final answer
    x = 133,235.13

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.