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Finding the Fourth Proportional to 54.86, 82.27 and 54.18

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Solution

The fourth proportional to 54.86, 82.27 and 54.18 is: 81.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.86 : 82.27 = 54.18 : x
  2. Step 2: Convert to fraction form
    54.86/82.27 = 54.18/x
  3. Step 3: Cross multiply
    54.86x = 82.27 × 54.18
  4. Step 4: Simplify right side
    54.86x = 4,457.46
  5. Step 5: Solve for x
    x = 4,457.46/54.86
  6. Step 6: Final answer
    x = 81.26

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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.