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Finding the Fourth Proportional to 94.22, 141.27 and 74.90

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Solution

The fourth proportional to 94.22, 141.27 and 74.90 is: 112.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.22 : 141.27 = 74.90 : x
  2. Step 2: Convert to fraction form
    94.22/141.27 = 74.90/x
  3. Step 3: Cross multiply
    94.22x = 141.27 × 74.90
  4. Step 4: Simplify right side
    94.22x = 10,581.12
  5. Step 5: Solve for x
    x = 10,581.12/94.22
  6. Step 6: Final answer
    x = 112.31

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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.