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Finding the Fourth Proportional to 94.22, 141.26 and 42.88

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Solution

The fourth proportional to 94.22, 141.26 and 42.88 is: 64.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.22 : 141.26 = 42.88 : x
  2. Step 2: Convert to fraction form
    94.22/141.26 = 42.88/x
  3. Step 3: Cross multiply
    94.22x = 141.26 × 42.88
  4. Step 4: Simplify right side
    94.22x = 6,057.23
  5. Step 5: Solve for x
    x = 6,057.23/94.22
  6. Step 6: Final answer
    x = 64.29

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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.