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Finding the Fourth Proportional to 143.36, 197.78 and 88.08

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Solution

The fourth proportional to 143.36, 197.78 and 88.08 is: 121.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.36 : 197.78 = 88.08 : x
  2. Step 2: Convert to fraction form
    143.36/197.78 = 88.08/x
  3. Step 3: Cross multiply
    143.36x = 197.78 × 88.08
  4. Step 4: Simplify right side
    143.36x = 17,419.28
  5. Step 5: Solve for x
    x = 17,419.28/143.36
  6. Step 6: Final answer
    x = 121.51

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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.