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Finding the Third Proportional to 57.13 and 85.38

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Solution

The third proportional to 57.13 and 85.38 is: 127.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.13 : 85.38 = 85.38 : x
  2. Step 2: Convert to fraction form
    57.13/85.38 = 85.38/x
  3. Step 3: Cross multiply
    57.13x = 85.38 × 85.38
  4. Step 4: Simplify right side
    57.13x = 7,288.89
  5. Step 5: Solve for x
    x = 7,288.89/57.13
  6. Step 6: Final answer
    x = 127.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.