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Finding the Third Proportional to 55,458 and 85,242

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Solution

The third proportional to 55,458 and 85,242 is: 131,021.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,458 : 85,242 = 85,242 : x
  2. Step 2: Convert to fraction form
    55,458/85,242 = 85,242/x
  3. Step 3: Cross multiply
    55,458x = 85,242 × 85,242
  4. Step 4: Simplify right side
    55,458x = 7,266,198,564
  5. Step 5: Solve for x
    x = 7,266,198,564/55,458
  6. Step 6: Final answer
    x = 131,021.65

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.