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Finding the Fourth Proportional to 143.86, 215.91 and 94.97

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Solution

The fourth proportional to 143.86, 215.91 and 94.97 is: 142.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.86 : 215.91 = 94.97 : x
  2. Step 2: Convert to fraction form
    143.86/215.91 = 94.97/x
  3. Step 3: Cross multiply
    143.86x = 215.91 × 94.97
  4. Step 4: Simplify right side
    143.86x = 20,504.43
  5. Step 5: Solve for x
    x = 20,504.43/143.86
  6. Step 6: Final answer
    x = 142.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.