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Finding the Fourth Proportional to 49.08, 68.17 and 48.72

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Solution

The fourth proportional to 49.08, 68.17 and 48.72 is: 67.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.08 : 68.17 = 48.72 : x
  2. Step 2: Convert to fraction form
    49.08/68.17 = 48.72/x
  3. Step 3: Cross multiply
    49.08x = 68.17 × 48.72
  4. Step 4: Simplify right side
    49.08x = 3,321.24
  5. Step 5: Solve for x
    x = 3,321.24/49.08
  6. Step 6: Final answer
    x = 67.67

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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.