Home / 120,568.20-180,938.70-67,921.80

Finding the Fourth Proportional to 120,568.20, 180,938.70 and 67,921.80

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Solution

The fourth proportional to 120,568.20, 180,938.70 and 67,921.80 is: 101,931.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,568.20 : 180,938.70 = 67,921.80 : x
  2. Step 2: Convert to fraction form
    120,568.20/180,938.70 = 67,921.80/x
  3. Step 3: Cross multiply
    120,568.20x = 180,938.70 × 67,921.80
  4. Step 4: Simplify right side
    120,568.20x = 12,289,682,193.66
  5. Step 5: Solve for x
    x = 12,289,682,193.66/120,568.20
  6. Step 6: Final answer
    x = 101,931.37

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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.