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Finding the Fourth Proportional to 179.70, 269.51 and 76.99

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Solution

The fourth proportional to 179.70, 269.51 and 76.99 is: 115.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.70 : 269.51 = 76.99 : x
  2. Step 2: Convert to fraction form
    179.70/269.51 = 76.99/x
  3. Step 3: Cross multiply
    179.70x = 269.51 × 76.99
  4. Step 4: Simplify right side
    179.70x = 20,749.57
  5. Step 5: Solve for x
    x = 20,749.57/179.70
  6. Step 6: Final answer
    x = 115.47

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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.