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Finding the Fourth Proportional to 119.11, 178.45 and 106.50

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Solution

The fourth proportional to 119.11, 178.45 and 106.50 is: 159.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.11 : 178.45 = 106.50 : x
  2. Step 2: Convert to fraction form
    119.11/178.45 = 106.50/x
  3. Step 3: Cross multiply
    119.11x = 178.45 × 106.50
  4. Step 4: Simplify right side
    119.11x = 19,004.93
  5. Step 5: Solve for x
    x = 19,004.93/119.11
  6. Step 6: Final answer
    x = 159.56

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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.