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Finding the Fourth Proportional to 94.31, 141.27 and 89.33

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Solution

The fourth proportional to 94.31, 141.27 and 89.33 is: 133.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.31 : 141.27 = 89.33 : x
  2. Step 2: Convert to fraction form
    94.31/141.27 = 89.33/x
  3. Step 3: Cross multiply
    94.31x = 141.27 × 89.33
  4. Step 4: Simplify right side
    94.31x = 12,619.65
  5. Step 5: Solve for x
    x = 12,619.65/94.31
  6. Step 6: Final answer
    x = 133.81

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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.