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Finding the Third Proportional to 39,892 and 87,028

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Solution

The third proportional to 39,892 and 87,028 is: 189,859.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,892 : 87,028 = 87,028 : x
  2. Step 2: Convert to fraction form
    39,892/87,028 = 87,028/x
  3. Step 3: Cross multiply
    39,892x = 87,028 × 87,028
  4. Step 4: Simplify right side
    39,892x = 7,573,872,784
  5. Step 5: Solve for x
    x = 7,573,872,784/39,892
  6. Step 6: Final answer
    x = 189,859.44

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.