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Finding the Fourth Proportional to 143.28, 197.78 and 110.48

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Solution

The fourth proportional to 143.28, 197.78 and 110.48 is: 152.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.28 : 197.78 = 110.48 : x
  2. Step 2: Convert to fraction form
    143.28/197.78 = 110.48/x
  3. Step 3: Cross multiply
    143.28x = 197.78 × 110.48
  4. Step 4: Simplify right side
    143.28x = 21,849.19
  5. Step 5: Solve for x
    x = 21,849.19/143.28
  6. Step 6: Final answer
    x = 152.49

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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.