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Finding the Fourth Proportional to 54.95, 81.97 and 53.24

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Solution

The fourth proportional to 54.95, 81.97 and 53.24 is: 79.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.95 : 81.97 = 53.24 : x
  2. Step 2: Convert to fraction form
    54.95/81.97 = 53.24/x
  3. Step 3: Cross multiply
    54.95x = 81.97 × 53.24
  4. Step 4: Simplify right side
    54.95x = 4,363.54
  5. Step 5: Solve for x
    x = 4,363.54/54.95
  6. Step 6: Final answer
    x = 79.42

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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.