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Finding the Fourth Proportional to 57.88, 86.43 and 50.68

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Solution

The fourth proportional to 57.88, 86.43 and 50.68 is: 75.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.88 : 86.43 = 50.68 : x
  2. Step 2: Convert to fraction form
    57.88/86.43 = 50.68/x
  3. Step 3: Cross multiply
    57.88x = 86.43 × 50.68
  4. Step 4: Simplify right side
    57.88x = 4,380.27
  5. Step 5: Solve for x
    x = 4,380.27/57.88
  6. Step 6: Final answer
    x = 75.68

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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.