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Finding the Fourth Proportional to 57.49, 85.82 and 50.67

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Solution

The fourth proportional to 57.49, 85.82 and 50.67 is: 75.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.49 : 85.82 = 50.67 : x
  2. Step 2: Convert to fraction form
    57.49/85.82 = 50.67/x
  3. Step 3: Cross multiply
    57.49x = 85.82 × 50.67
  4. Step 4: Simplify right side
    57.49x = 4,348.25
  5. Step 5: Solve for x
    x = 4,348.25/57.49
  6. Step 6: Final answer
    x = 75.64

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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.