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Finding the Fourth Proportional to 54.26, 81.42 and 36.20

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Solution

The fourth proportional to 54.26, 81.42 and 36.20 is: 54.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.26 : 81.42 = 36.20 : x
  2. Step 2: Convert to fraction form
    54.26/81.42 = 36.20/x
  3. Step 3: Cross multiply
    54.26x = 81.42 × 36.20
  4. Step 4: Simplify right side
    54.26x = 2,947.40
  5. Step 5: Solve for x
    x = 2,947.40/54.26
  6. Step 6: Final answer
    x = 54.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.