Home / 80,741.65-120,816.26-67,381.67

Finding the Fourth Proportional to 80,741.65, 120,816.26 and 67,381.67

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Solution

The fourth proportional to 80,741.65, 120,816.26 and 67,381.67 is: 100,825.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,741.65 : 120,816.26 = 67,381.67 : x
  2. Step 2: Convert to fraction form
    80,741.65/120,816.26 = 67,381.67/x
  3. Step 3: Cross multiply
    80,741.65x = 120,816.26 × 67,381.67
  4. Step 4: Simplify right side
    80,741.65x = 8,140,801,361.95
  5. Step 5: Solve for x
    x = 8,140,801,361.95/80,741.65
  6. Step 6: Final answer
    x = 100,825.30

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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.