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Finding the Fourth Proportional to 54.83, 81.66 and 54.58

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Solution

The fourth proportional to 54.83, 81.66 and 54.58 is: 81.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.83 : 81.66 = 54.58 : x
  2. Step 2: Convert to fraction form
    54.83/81.66 = 54.58/x
  3. Step 3: Cross multiply
    54.83x = 81.66 × 54.58
  4. Step 4: Simplify right side
    54.83x = 4,456.80
  5. Step 5: Solve for x
    x = 4,456.80/54.83
  6. Step 6: Final answer
    x = 81.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.