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Finding the Third Proportional to 39,888 and 86,328

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Solution

The third proportional to 39,888 and 86,328 is: 186,836.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,888 : 86,328 = 86,328 : x
  2. Step 2: Convert to fraction form
    39,888/86,328 = 86,328/x
  3. Step 3: Cross multiply
    39,888x = 86,328 × 86,328
  4. Step 4: Simplify right side
    39,888x = 7,452,523,584
  5. Step 5: Solve for x
    x = 7,452,523,584/39,888
  6. Step 6: Final answer
    x = 186,836.23

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.