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Finding the Fourth Proportional to 69.47, 95.30 and 67.67

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Solution

The fourth proportional to 69.47, 95.30 and 67.67 is: 92.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.47 : 95.30 = 67.67 : x
  2. Step 2: Convert to fraction form
    69.47/95.30 = 67.67/x
  3. Step 3: Cross multiply
    69.47x = 95.30 × 67.67
  4. Step 4: Simplify right side
    69.47x = 6,448.14
  5. Step 5: Solve for x
    x = 6,448.14/69.47
  6. Step 6: Final answer
    x = 92.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.