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Finding the Fourth Proportional to 179.69, 269.33 and 128.39

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Solution

The fourth proportional to 179.69, 269.33 and 128.39 is: 192.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.69 : 269.33 = 128.39 : x
  2. Step 2: Convert to fraction form
    179.69/269.33 = 128.39/x
  3. Step 3: Cross multiply
    179.69x = 269.33 × 128.39
  4. Step 4: Simplify right side
    179.69x = 34,577.29
  5. Step 5: Solve for x
    x = 34,577.29/179.69
  6. Step 6: Final answer
    x = 192.43

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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.