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Finding the Fourth Proportional to 235.01, 352.42 and 80.90

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Solution

The fourth proportional to 235.01, 352.42 and 80.90 is: 121.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.01 : 352.42 = 80.90 : x
  2. Step 2: Convert to fraction form
    235.01/352.42 = 80.90/x
  3. Step 3: Cross multiply
    235.01x = 352.42 × 80.90
  4. Step 4: Simplify right side
    235.01x = 28,510.14
  5. Step 5: Solve for x
    x = 28,510.14/235.01
  6. Step 6: Final answer
    x = 121.31

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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.