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Finding the Fourth Proportional to 179.91, 248.31 and 109.89

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Solution

The fourth proportional to 179.91, 248.31 and 109.89 is: 151.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.91 : 248.31 = 109.89 : x
  2. Step 2: Convert to fraction form
    179.91/248.31 = 109.89/x
  3. Step 3: Cross multiply
    179.91x = 248.31 × 109.89
  4. Step 4: Simplify right side
    179.91x = 27,286.79
  5. Step 5: Solve for x
    x = 27,286.79/179.91
  6. Step 6: Final answer
    x = 151.67

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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.