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Finding the Fourth Proportional to 190.03, 285.11 and 80.37

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Solution

The fourth proportional to 190.03, 285.11 and 80.37 is: 120.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.03 : 285.11 = 80.37 : x
  2. Step 2: Convert to fraction form
    190.03/285.11 = 80.37/x
  3. Step 3: Cross multiply
    190.03x = 285.11 × 80.37
  4. Step 4: Simplify right side
    190.03x = 22,913.12
  5. Step 5: Solve for x
    x = 22,913.12/190.03
  6. Step 6: Final answer
    x = 120.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.