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Finding the Fourth Proportional to 143.61, 199.01 and 140.88

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Solution

The fourth proportional to 143.61, 199.01 and 140.88 is: 195.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.61 : 199.01 = 140.88 : x
  2. Step 2: Convert to fraction form
    143.61/199.01 = 140.88/x
  3. Step 3: Cross multiply
    143.61x = 199.01 × 140.88
  4. Step 4: Simplify right side
    143.61x = 28,035.53
  5. Step 5: Solve for x
    x = 28,035.53/143.61
  6. Step 6: Final answer
    x = 195.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.