Home / 80,367.21-120,434.18-45,231.84

Finding the Fourth Proportional to 80,367.21, 120,434.18 and 45,231.84

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Solution

The fourth proportional to 80,367.21, 120,434.18 and 45,231.84 is: 67,782.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,367.21 : 120,434.18 = 45,231.84 : x
  2. Step 2: Convert to fraction form
    80,367.21/120,434.18 = 45,231.84/x
  3. Step 3: Cross multiply
    80,367.21x = 120,434.18 × 45,231.84
  4. Step 4: Simplify right side
    80,367.21x = 5,447,459,334.13
  5. Step 5: Solve for x
    x = 5,447,459,334.13/80,367.21
  6. Step 6: Final answer
    x = 67,782.11

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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.