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Finding the Fourth Proportional to 143.23, 197.52 and 104.15

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Solution

The fourth proportional to 143.23, 197.52 and 104.15 is: 143.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.23 : 197.52 = 104.15 : x
  2. Step 2: Convert to fraction form
    143.23/197.52 = 104.15/x
  3. Step 3: Cross multiply
    143.23x = 197.52 × 104.15
  4. Step 4: Simplify right side
    143.23x = 20,571.71
  5. Step 5: Solve for x
    x = 20,571.71/143.23
  6. Step 6: Final answer
    x = 143.63

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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.