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Finding the Third Proportional to 55,218 and 85,660

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Solution

The third proportional to 55,218 and 85,660 is: 132,884.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,218 : 85,660 = 85,660 : x
  2. Step 2: Convert to fraction form
    55,218/85,660 = 85,660/x
  3. Step 3: Cross multiply
    55,218x = 85,660 × 85,660
  4. Step 4: Simplify right side
    55,218x = 7,337,635,600
  5. Step 5: Solve for x
    x = 7,337,635,600/55,218
  6. Step 6: Final answer
    x = 132,884.85

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.