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Finding the Fourth Proportional to 193.05, 266.15 and 143.78

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Solution

The fourth proportional to 193.05, 266.15 and 143.78 is: 198.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.05 : 266.15 = 143.78 : x
  2. Step 2: Convert to fraction form
    193.05/266.15 = 143.78/x
  3. Step 3: Cross multiply
    193.05x = 266.15 × 143.78
  4. Step 4: Simplify right side
    193.05x = 38,266.08
  5. Step 5: Solve for x
    x = 38,266.08/193.05
  6. Step 6: Final answer
    x = 198.22

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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.