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Finding the Fourth Proportional to 179.65, 247.88 and 109.74

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Solution

The fourth proportional to 179.65, 247.88 and 109.74 is: 151.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.65 : 247.88 = 109.74 : x
  2. Step 2: Convert to fraction form
    179.65/247.88 = 109.74/x
  3. Step 3: Cross multiply
    179.65x = 247.88 × 109.74
  4. Step 4: Simplify right side
    179.65x = 27,201.54
  5. Step 5: Solve for x
    x = 27,201.54/179.65
  6. Step 6: Final answer
    x = 151.41

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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.