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Finding the Third Proportional to 54.69 and 85.75

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Solution

The third proportional to 54.69 and 85.75 is: 134.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.69 : 85.75 = 85.75 : x
  2. Step 2: Convert to fraction form
    54.69/85.75 = 85.75/x
  3. Step 3: Cross multiply
    54.69x = 85.75 × 85.75
  4. Step 4: Simplify right side
    54.69x = 7,353.06
  5. Step 5: Solve for x
    x = 7,353.06/54.69
  6. Step 6: Final answer
    x = 134.46

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.