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Finding the Fourth Proportional to 190.86, 263.33 and 112.15

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Solution

The fourth proportional to 190.86, 263.33 and 112.15 is: 154.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.86 : 263.33 = 112.15 : x
  2. Step 2: Convert to fraction form
    190.86/263.33 = 112.15/x
  3. Step 3: Cross multiply
    190.86x = 263.33 × 112.15
  4. Step 4: Simplify right side
    190.86x = 29,531.56
  5. Step 5: Solve for x
    x = 29,531.56/190.86
  6. Step 6: Final answer
    x = 154.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.