Home / 80,868.40-121,324.20-72,163.60

Finding the Fourth Proportional to 80,868.40, 121,324.20 and 72,163.60

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Solution

The fourth proportional to 80,868.40, 121,324.20 and 72,163.60 is: 108,264.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,868.40 : 121,324.20 = 72,163.60 : x
  2. Step 2: Convert to fraction form
    80,868.40/121,324.20 = 72,163.60/x
  3. Step 3: Cross multiply
    80,868.40x = 121,324.20 × 72,163.60
  4. Step 4: Simplify right side
    80,868.40x = 8,755,191,039.12
  5. Step 5: Solve for x
    x = 8,755,191,039.12/80,868.40
  6. Step 6: Final answer
    x = 108,264.67

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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.