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Finding the Fourth Proportional to 80.02, 120.03 and 31.29

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Solution

The fourth proportional to 80.02, 120.03 and 31.29 is: 46.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.02 : 120.03 = 31.29 : x
  2. Step 2: Convert to fraction form
    80.02/120.03 = 31.29/x
  3. Step 3: Cross multiply
    80.02x = 120.03 × 31.29
  4. Step 4: Simplify right side
    80.02x = 3,755.74
  5. Step 5: Solve for x
    x = 3,755.74/80.02
  6. Step 6: Final answer
    x = 46.94

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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.