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Finding the Fourth Proportional to 179.70, 269.28 and 139.07

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Solution

The fourth proportional to 179.70, 269.28 and 139.07 is: 208.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.70 : 269.28 = 139.07 : x
  2. Step 2: Convert to fraction form
    179.70/269.28 = 139.07/x
  3. Step 3: Cross multiply
    179.70x = 269.28 × 139.07
  4. Step 4: Simplify right side
    179.70x = 37,447.42
  5. Step 5: Solve for x
    x = 37,447.42/179.70
  6. Step 6: Final answer
    x = 208.39

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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.