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Finding the Third Proportional to 128.14 and 195.54

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Solution

The third proportional to 128.14 and 195.54 is: 298.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.14 : 195.54 = 195.54 : x
  2. Step 2: Convert to fraction form
    128.14/195.54 = 195.54/x
  3. Step 3: Cross multiply
    128.14x = 195.54 × 195.54
  4. Step 4: Simplify right side
    128.14x = 38,235.52
  5. Step 5: Solve for x
    x = 38,235.52/128.14
  6. Step 6: Final answer
    x = 298.38

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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.