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Finding the Fourth Proportional to 119.49, 178.28 and 109.37

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Solution

The fourth proportional to 119.49, 178.28 and 109.37 is: 163.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.49 : 178.28 = 109.37 : x
  2. Step 2: Convert to fraction form
    119.49/178.28 = 109.37/x
  3. Step 3: Cross multiply
    119.49x = 178.28 × 109.37
  4. Step 4: Simplify right side
    119.49x = 19,497.05
  5. Step 5: Solve for x
    x = 19,497.05/119.49
  6. Step 6: Final answer
    x = 163.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.