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Finding the Fourth Proportional to 109.26, 150.87 and 67.88

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Solution

The fourth proportional to 109.26, 150.87 and 67.88 is: 93.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.26 : 150.87 = 67.88 : x
  2. Step 2: Convert to fraction form
    109.26/150.87 = 67.88/x
  3. Step 3: Cross multiply
    109.26x = 150.87 × 67.88
  4. Step 4: Simplify right side
    109.26x = 10,240.77
  5. Step 5: Solve for x
    x = 10,240.77/109.26
  6. Step 6: Final answer
    x = 93.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.