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Finding the Fourth Proportional to 143.69, 214.23 and 140.10

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Solution

The fourth proportional to 143.69, 214.23 and 140.10 is: 208.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.69 : 214.23 = 140.10 : x
  2. Step 2: Convert to fraction form
    143.69/214.23 = 140.10/x
  3. Step 3: Cross multiply
    143.69x = 214.23 × 140.10
  4. Step 4: Simplify right side
    143.69x = 30,012.56
  5. Step 5: Solve for x
    x = 30,012.56/143.69
  6. Step 6: Final answer
    x = 208.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.