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Finding the Fourth Proportional to 80,119.81, 120,170.53 and 20,961.19

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Solution

The fourth proportional to 80,119.81, 120,170.53 and 20,961.19 is: 31,439.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,119.81 : 120,170.53 = 20,961.19 : x
  2. Step 2: Convert to fraction form
    80,119.81/120,170.53 = 20,961.19/x
  3. Step 3: Cross multiply
    80,119.81x = 120,170.53 × 20,961.19
  4. Step 4: Simplify right side
    80,119.81x = 2,518,917,311.73
  5. Step 5: Solve for x
    x = 2,518,917,311.73/80,119.81
  6. Step 6: Final answer
    x = 31,439.38

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1.5x scale

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.