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Finding the Fourth Proportional to 49.35, 68.57 and 48.87

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Solution

The fourth proportional to 49.35, 68.57 and 48.87 is: 67.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.35 : 68.57 = 48.87 : x
  2. Step 2: Convert to fraction form
    49.35/68.57 = 48.87/x
  3. Step 3: Cross multiply
    49.35x = 68.57 × 48.87
  4. Step 4: Simplify right side
    49.35x = 3,350.77
  5. Step 5: Solve for x
    x = 3,350.77/49.35
  6. Step 6: Final answer
    x = 67.90

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.