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Finding the Fourth Proportional to 143.55, 198.54 and 141.93

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Solution

The fourth proportional to 143.55, 198.54 and 141.93 is: 196.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.55 : 198.54 = 141.93 : x
  2. Step 2: Convert to fraction form
    143.55/198.54 = 141.93/x
  3. Step 3: Cross multiply
    143.55x = 198.54 × 141.93
  4. Step 4: Simplify right side
    143.55x = 28,178.78
  5. Step 5: Solve for x
    x = 28,178.78/143.55
  6. Step 6: Final answer
    x = 196.30

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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.