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Finding the Third Proportional to 39,772 and 86,916

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Solution

The third proportional to 39,772 and 86,916 is: 189,942.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,772 : 86,916 = 86,916 : x
  2. Step 2: Convert to fraction form
    39,772/86,916 = 86,916/x
  3. Step 3: Cross multiply
    39,772x = 86,916 × 86,916
  4. Step 4: Simplify right side
    39,772x = 7,554,391,056
  5. Step 5: Solve for x
    x = 7,554,391,056/39,772
  6. Step 6: Final answer
    x = 189,942.45

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.