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Finding the Third Proportional to 86,618 and 129,579

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Solution

The third proportional to 86,618 and 129,579 is: 193,847.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,618 : 129,579 = 129,579 : x
  2. Step 2: Convert to fraction form
    86,618/129,579 = 129,579/x
  3. Step 3: Cross multiply
    86,618x = 129,579 × 129,579
  4. Step 4: Simplify right side
    86,618x = 16,790,717,241
  5. Step 5: Solve for x
    x = 16,790,717,241/86,618
  6. Step 6: Final answer
    x = 193,847.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.