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Finding the Third Proportional to 55,242 and 84,564

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Solution

The third proportional to 55,242 and 84,564 is: 129,449.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,242 : 84,564 = 84,564 : x
  2. Step 2: Convert to fraction form
    55,242/84,564 = 84,564/x
  3. Step 3: Cross multiply
    55,242x = 84,564 × 84,564
  4. Step 4: Simplify right side
    55,242x = 7,151,070,096
  5. Step 5: Solve for x
    x = 7,151,070,096/55,242
  6. Step 6: Final answer
    x = 129,449.88

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.