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Finding the Third Proportional to 39,665 and 82,618

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Solution

The third proportional to 39,665 and 82,618 is: 172,084.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,665 : 82,618 = 82,618 : x
  2. Step 2: Convert to fraction form
    39,665/82,618 = 82,618/x
  3. Step 3: Cross multiply
    39,665x = 82,618 × 82,618
  4. Step 4: Simplify right side
    39,665x = 6,825,733,924
  5. Step 5: Solve for x
    x = 6,825,733,924/39,665
  6. Step 6: Final answer
    x = 172,084.56

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.