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Finding the Third Proportional to 27,978 and 54,539

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Solution

The third proportional to 27,978 and 54,539 is: 106,315.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,978 : 54,539 = 54,539 : x
  2. Step 2: Convert to fraction form
    27,978/54,539 = 54,539/x
  3. Step 3: Cross multiply
    27,978x = 54,539 × 54,539
  4. Step 4: Simplify right side
    27,978x = 2,974,502,521
  5. Step 5: Solve for x
    x = 2,974,502,521/27,978
  6. Step 6: Final answer
    x = 106,315.77

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.