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Finding the Third Proportional to 86,286 and 135,384

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Solution

The third proportional to 86,286 and 135,384 is: 212,419.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,286 : 135,384 = 135,384 : x
  2. Step 2: Convert to fraction form
    86,286/135,384 = 135,384/x
  3. Step 3: Cross multiply
    86,286x = 135,384 × 135,384
  4. Step 4: Simplify right side
    86,286x = 18,328,827,456
  5. Step 5: Solve for x
    x = 18,328,827,456/86,286
  6. Step 6: Final answer
    x = 212,419.48

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.