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Finding the Fourth Proportional to 80.05, 120.01 and 31.93

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Solution

The fourth proportional to 80.05, 120.01 and 31.93 is: 47.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.05 : 120.01 = 31.93 : x
  2. Step 2: Convert to fraction form
    80.05/120.01 = 31.93/x
  3. Step 3: Cross multiply
    80.05x = 120.01 × 31.93
  4. Step 4: Simplify right side
    80.05x = 3,831.92
  5. Step 5: Solve for x
    x = 3,831.92/80.05
  6. Step 6: Final answer
    x = 47.87

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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.