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Finding the Fourth Proportional to 57.63, 86.04 and 54.18

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Solution

The fourth proportional to 57.63, 86.04 and 54.18 is: 80.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.63 : 86.04 = 54.18 : x
  2. Step 2: Convert to fraction form
    57.63/86.04 = 54.18/x
  3. Step 3: Cross multiply
    57.63x = 86.04 × 54.18
  4. Step 4: Simplify right side
    57.63x = 4,661.65
  5. Step 5: Solve for x
    x = 4,661.65/57.63
  6. Step 6: Final answer
    x = 80.89

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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.