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Finding the Fourth Proportional to 54.09, 81.10 and 27

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Solution

The fourth proportional to 54.09, 81.10 and 27 is: 40.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.09 : 81.10 = 27 : x
  2. Step 2: Convert to fraction form
    54.09/81.10 = 27/x
  3. Step 3: Cross multiply
    54.09x = 81.10 × 27
  4. Step 4: Simplify right side
    54.09x = 2,189.73
  5. Step 5: Solve for x
    x = 2,189.73/54.09
  6. Step 6: Final answer
    x = 40.48

Related Problems

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1.5x scale

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.