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Finding the Fourth Proportional to 190.35, 262.69 and 111.72

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Solution

The fourth proportional to 190.35, 262.69 and 111.72 is: 154.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.35 : 262.69 = 111.72 : x
  2. Step 2: Convert to fraction form
    190.35/262.69 = 111.72/x
  3. Step 3: Cross multiply
    190.35x = 262.69 × 111.72
  4. Step 4: Simplify right side
    190.35x = 29,347.73
  5. Step 5: Solve for x
    x = 29,347.73/190.35
  6. Step 6: Final answer
    x = 154.18

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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.