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Finding the Fourth Proportional to 54.33, 80.97 and 51.45

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Solution

The fourth proportional to 54.33, 80.97 and 51.45 is: 76.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.33 : 80.97 = 51.45 : x
  2. Step 2: Convert to fraction form
    54.33/80.97 = 51.45/x
  3. Step 3: Cross multiply
    54.33x = 80.97 × 51.45
  4. Step 4: Simplify right side
    54.33x = 4,165.91
  5. Step 5: Solve for x
    x = 4,165.91/54.33
  6. Step 6: Final answer
    x = 76.68

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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.