Home / 80,109.21-120,170.63-20,944.78

Finding the Fourth Proportional to 80,109.21, 120,170.63 and 20,944.78

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Solution

The fourth proportional to 80,109.21, 120,170.63 and 20,944.78 is: 31,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,109.21 : 120,170.63 = 20,944.78 : x
  2. Step 2: Convert to fraction form
    80,109.21/120,170.63 = 20,944.78/x
  3. Step 3: Cross multiply
    80,109.21x = 120,170.63 × 20,944.78
  4. Step 4: Simplify right side
    80,109.21x = 2,516,947,407.81
  5. Step 5: Solve for x
    x = 2,516,947,407.81/80,109.21
  6. Step 6: Final answer
    x = 31,418.95

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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.