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Finding the Fourth Proportional to 144.57, 199.90 and 142.26

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Solution

The fourth proportional to 144.57, 199.90 and 142.26 is: 196.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.57 : 199.90 = 142.26 : x
  2. Step 2: Convert to fraction form
    144.57/199.90 = 142.26/x
  3. Step 3: Cross multiply
    144.57x = 199.90 × 142.26
  4. Step 4: Simplify right side
    144.57x = 28,437.77
  5. Step 5: Solve for x
    x = 28,437.77/144.57
  6. Step 6: Final answer
    x = 196.71

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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.