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Finding the Fourth Proportional to 143.94, 215.74 and 94.55

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Solution

The fourth proportional to 143.94, 215.74 and 94.55 is: 141.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.94 : 215.74 = 94.55 : x
  2. Step 2: Convert to fraction form
    143.94/215.74 = 94.55/x
  3. Step 3: Cross multiply
    143.94x = 215.74 × 94.55
  4. Step 4: Simplify right side
    143.94x = 20,398.22
  5. Step 5: Solve for x
    x = 20,398.22/143.94
  6. Step 6: Final answer
    x = 141.71

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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.