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Finding the Third Proportional to 86,040 and 138,612

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Solution

The third proportional to 86,040 and 138,612 is: 223,306.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,040 : 138,612 = 138,612 : x
  2. Step 2: Convert to fraction form
    86,040/138,612 = 138,612/x
  3. Step 3: Cross multiply
    86,040x = 138,612 × 138,612
  4. Step 4: Simplify right side
    86,040x = 19,213,286,544
  5. Step 5: Solve for x
    x = 19,213,286,544/86,040
  6. Step 6: Final answer
    x = 223,306.45

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.