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Finding the Third Proportional to 39,957 and 87,690

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Solution

The third proportional to 39,957 and 87,690 is: 192,445.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,957 : 87,690 = 87,690 : x
  2. Step 2: Convert to fraction form
    39,957/87,690 = 87,690/x
  3. Step 3: Cross multiply
    39,957x = 87,690 × 87,690
  4. Step 4: Simplify right side
    39,957x = 7,689,536,100
  5. Step 5: Solve for x
    x = 7,689,536,100/39,957
  6. Step 6: Final answer
    x = 192,445.28

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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.