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Finding the Third Proportional to 86,678 and 137,538

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Solution

The third proportional to 86,678 and 137,538 is: 218,241.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,678 : 137,538 = 137,538 : x
  2. Step 2: Convert to fraction form
    86,678/137,538 = 137,538/x
  3. Step 3: Cross multiply
    86,678x = 137,538 × 137,538
  4. Step 4: Simplify right side
    86,678x = 18,916,701,444
  5. Step 5: Solve for x
    x = 18,916,701,444/86,678
  6. Step 6: Final answer
    x = 218,241.09

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.