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Finding the Fourth Proportional to 190.19, 262.43 and 111.50

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Solution

The fourth proportional to 190.19, 262.43 and 111.50 is: 153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.19 : 262.43 = 111.50 : x
  2. Step 2: Convert to fraction form
    190.19/262.43 = 111.50/x
  3. Step 3: Cross multiply
    190.19x = 262.43 × 111.50
  4. Step 4: Simplify right side
    190.19x = 29,259.08
  5. Step 5: Solve for x
    x = 29,259.08/190.19
  6. Step 6: Final answer
    x = 153.85

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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.