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Finding the Third Proportional to 39,872 and 85,888

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Solution

The third proportional to 39,872 and 85,888 is: 185,010.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,872 : 85,888 = 85,888 : x
  2. Step 2: Convert to fraction form
    39,872/85,888 = 85,888/x
  3. Step 3: Cross multiply
    39,872x = 85,888 × 85,888
  4. Step 4: Simplify right side
    39,872x = 7,376,748,544
  5. Step 5: Solve for x
    x = 7,376,748,544/39,872
  6. Step 6: Final answer
    x = 185,010.75

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.