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Finding the Fourth Proportional to 54.59, 81.74 and 34.31

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Solution

The fourth proportional to 54.59, 81.74 and 34.31 is: 51.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.59 : 81.74 = 34.31 : x
  2. Step 2: Convert to fraction form
    54.59/81.74 = 34.31/x
  3. Step 3: Cross multiply
    54.59x = 81.74 × 34.31
  4. Step 4: Simplify right side
    54.59x = 2,804.79
  5. Step 5: Solve for x
    x = 2,804.79/54.59
  6. Step 6: Final answer
    x = 51.38

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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.