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Finding the Fourth Proportional to 150.80, 226.30 and 85.80

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Solution

The fourth proportional to 150.80, 226.30 and 85.80 is: 128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.80 : 226.30 = 85.80 : x
  2. Step 2: Convert to fraction form
    150.80/226.30 = 85.80/x
  3. Step 3: Cross multiply
    150.80x = 226.30 × 85.80
  4. Step 4: Simplify right side
    150.80x = 19,416.54
  5. Step 5: Solve for x
    x = 19,416.54/150.80
  6. Step 6: Final answer
    x = 128.76

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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.