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Finding the Fourth Proportional to 63.15, 94.31 and 54.06

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Solution

The fourth proportional to 63.15, 94.31 and 54.06 is: 80.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.15 : 94.31 = 54.06 : x
  2. Step 2: Convert to fraction form
    63.15/94.31 = 54.06/x
  3. Step 3: Cross multiply
    63.15x = 94.31 × 54.06
  4. Step 4: Simplify right side
    63.15x = 5,098.13
  5. Step 5: Solve for x
    x = 5,098.13/63.15
  6. Step 6: Final answer
    x = 80.73

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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.