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Finding the Fourth Proportional to 54.26, 81.82 and 51.08

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Solution

The fourth proportional to 54.26, 81.82 and 51.08 is: 77.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.26 : 81.82 = 51.08 : x
  2. Step 2: Convert to fraction form
    54.26/81.82 = 51.08/x
  3. Step 3: Cross multiply
    54.26x = 81.82 × 51.08
  4. Step 4: Simplify right side
    54.26x = 4,179.37
  5. Step 5: Solve for x
    x = 4,179.37/54.26
  6. Step 6: Final answer
    x = 77.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.