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Finding the Fourth Proportional to 155.70, 234.41 and 119.79

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Solution

The fourth proportional to 155.70, 234.41 and 119.79 is: 180.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.70 : 234.41 = 119.79 : x
  2. Step 2: Convert to fraction form
    155.70/234.41 = 119.79/x
  3. Step 3: Cross multiply
    155.70x = 234.41 × 119.79
  4. Step 4: Simplify right side
    155.70x = 28,079.37
  5. Step 5: Solve for x
    x = 28,079.37/155.70
  6. Step 6: Final answer
    x = 180.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.