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Finding the Fourth Proportional to 54.15, 81.23 and 36.06

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Solution

The fourth proportional to 54.15, 81.23 and 36.06 is: 54.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.15 : 81.23 = 36.06 : x
  2. Step 2: Convert to fraction form
    54.15/81.23 = 36.06/x
  3. Step 3: Cross multiply
    54.15x = 81.23 × 36.06
  4. Step 4: Simplify right side
    54.15x = 2,928.97
  5. Step 5: Solve for x
    x = 2,928.97/54.15
  6. Step 6: Final answer
    x = 54.09

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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.