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Finding the Fourth Proportional to 179.65, 247.97 and 109.72

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Solution

The fourth proportional to 179.65, 247.97 and 109.72 is: 151.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.65 : 247.97 = 109.72 : x
  2. Step 2: Convert to fraction form
    179.65/247.97 = 109.72/x
  3. Step 3: Cross multiply
    179.65x = 247.97 × 109.72
  4. Step 4: Simplify right side
    179.65x = 27,207.27
  5. Step 5: Solve for x
    x = 27,207.27/179.65
  6. Step 6: Final answer
    x = 151.45

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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.