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Finding the Third Proportional to 38,820 and 83,172

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Solution

The third proportional to 38,820 and 83,172 is: 178,196.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,820 : 83,172 = 83,172 : x
  2. Step 2: Convert to fraction form
    38,820/83,172 = 83,172/x
  3. Step 3: Cross multiply
    38,820x = 83,172 × 83,172
  4. Step 4: Simplify right side
    38,820x = 6,917,581,584
  5. Step 5: Solve for x
    x = 6,917,581,584/38,820
  6. Step 6: Final answer
    x = 178,196.33

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.