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Finding the Fourth Proportional to 150.12, 223.81 and 142.44

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Solution

The fourth proportional to 150.12, 223.81 and 142.44 is: 212.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.12 : 223.81 = 142.44 : x
  2. Step 2: Convert to fraction form
    150.12/223.81 = 142.44/x
  3. Step 3: Cross multiply
    150.12x = 223.81 × 142.44
  4. Step 4: Simplify right side
    150.12x = 31,879.50
  5. Step 5: Solve for x
    x = 31,879.50/150.12
  6. Step 6: Final answer
    x = 212.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.