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Finding the Fourth Proportional to 119.42, 178.94 and 88.74

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Solution

The fourth proportional to 119.42, 178.94 and 88.74 is: 132.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.42 : 178.94 = 88.74 : x
  2. Step 2: Convert to fraction form
    119.42/178.94 = 88.74/x
  3. Step 3: Cross multiply
    119.42x = 178.94 × 88.74
  4. Step 4: Simplify right side
    119.42x = 15,879.14
  5. Step 5: Solve for x
    x = 15,879.14/119.42
  6. Step 6: Final answer
    x = 132.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.