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Finding the Fourth Proportional to 179.95, 269.74 and 77.26

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Solution

The fourth proportional to 179.95, 269.74 and 77.26 is: 115.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.95 : 269.74 = 77.26 : x
  2. Step 2: Convert to fraction form
    179.95/269.74 = 77.26/x
  3. Step 3: Cross multiply
    179.95x = 269.74 × 77.26
  4. Step 4: Simplify right side
    179.95x = 20,839.24
  5. Step 5: Solve for x
    x = 20,839.24/179.95
  6. Step 6: Final answer
    x = 115.81

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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.