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Finding the Fourth Proportional to 143.45, 197.33 and 137.37

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Solution

The fourth proportional to 143.45, 197.33 and 137.37 is: 188.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.45 : 197.33 = 137.37 : x
  2. Step 2: Convert to fraction form
    143.45/197.33 = 137.37/x
  3. Step 3: Cross multiply
    143.45x = 197.33 × 137.37
  4. Step 4: Simplify right side
    143.45x = 27,106.54
  5. Step 5: Solve for x
    x = 27,106.54/143.45
  6. Step 6: Final answer
    x = 188.97

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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.