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Finding the Third Proportional to 39,504 and 85,920

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Solution

The third proportional to 39,504 and 85,920 is: 186,873.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,504 : 85,920 = 85,920 : x
  2. Step 2: Convert to fraction form
    39,504/85,920 = 85,920/x
  3. Step 3: Cross multiply
    39,504x = 85,920 × 85,920
  4. Step 4: Simplify right side
    39,504x = 7,382,246,400
  5. Step 5: Solve for x
    x = 7,382,246,400/39,504
  6. Step 6: Final answer
    x = 186,873.39

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.