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Finding the Fourth Proportional to 190.11, 262.37 and 111.45

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Solution

The fourth proportional to 190.11, 262.37 and 111.45 is: 153.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.11 : 262.37 = 111.45 : x
  2. Step 2: Convert to fraction form
    190.11/262.37 = 111.45/x
  3. Step 3: Cross multiply
    190.11x = 262.37 × 111.45
  4. Step 4: Simplify right side
    190.11x = 29,241.14
  5. Step 5: Solve for x
    x = 29,241.14/190.11
  6. Step 6: Final answer
    x = 153.81

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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.