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Finding the Fourth Proportional to 57.67, 86.94 and 53.75

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Solution

The fourth proportional to 57.67, 86.94 and 53.75 is: 81.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.67 : 86.94 = 53.75 : x
  2. Step 2: Convert to fraction form
    57.67/86.94 = 53.75/x
  3. Step 3: Cross multiply
    57.67x = 86.94 × 53.75
  4. Step 4: Simplify right side
    57.67x = 4,673.24
  5. Step 5: Solve for x
    x = 4,673.24/57.67
  6. Step 6: Final answer
    x = 81.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.