Home / 80,737.21-121,105.81-45,178.64

Finding the Fourth Proportional to 80,737.21, 121,105.81 and 45,178.64

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Solution

The fourth proportional to 80,737.21, 121,105.81 and 45,178.64 is: 67,767.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,737.21 : 121,105.81 = 45,178.64 : x
  2. Step 2: Convert to fraction form
    80,737.21/121,105.81 = 45,178.64/x
  3. Step 3: Cross multiply
    80,737.21x = 121,105.81 × 45,178.64
  4. Step 4: Simplify right side
    80,737.21x = 5,471,395,229.31
  5. Step 5: Solve for x
    x = 5,471,395,229.31/80,737.21
  6. Step 6: Final answer
    x = 67,767.95

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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.