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Finding the Third Proportional to 38,820 and 85,128

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Solution

The third proportional to 38,820 and 85,128 is: 186,676.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,820 : 85,128 = 85,128 : x
  2. Step 2: Convert to fraction form
    38,820/85,128 = 85,128/x
  3. Step 3: Cross multiply
    38,820x = 85,128 × 85,128
  4. Step 4: Simplify right side
    38,820x = 7,246,776,384
  5. Step 5: Solve for x
    x = 7,246,776,384/38,820
  6. Step 6: Final answer
    x = 186,676.36

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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.