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Finding the Fourth Proportional to 142.18, 213.21 and 44.66

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Solution

The fourth proportional to 142.18, 213.21 and 44.66 is: 66.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.18 : 213.21 = 44.66 : x
  2. Step 2: Convert to fraction form
    142.18/213.21 = 44.66/x
  3. Step 3: Cross multiply
    142.18x = 213.21 × 44.66
  4. Step 4: Simplify right side
    142.18x = 9,520.77
  5. Step 5: Solve for x
    x = 9,520.77/142.18
  6. Step 6: Final answer
    x = 66.96

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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.