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Finding the Third Proportional to 38,778 and 85,412

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Solution

The third proportional to 38,778 and 85,412 is: 188,127.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,778 : 85,412 = 85,412 : x
  2. Step 2: Convert to fraction form
    38,778/85,412 = 85,412/x
  3. Step 3: Cross multiply
    38,778x = 85,412 × 85,412
  4. Step 4: Simplify right side
    38,778x = 7,295,209,744
  5. Step 5: Solve for x
    x = 7,295,209,744/38,778
  6. Step 6: Final answer
    x = 188,127.54

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.