Home / 129,712.40-194,338.20-106,211.60

Finding the Fourth Proportional to 129,712.40, 194,338.20 and 106,211.60

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Solution

The fourth proportional to 129,712.40, 194,338.20 and 106,211.60 is: 159,128.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,712.40 : 194,338.20 = 106,211.60 : x
  2. Step 2: Convert to fraction form
    129,712.40/194,338.20 = 106,211.60/x
  3. Step 3: Cross multiply
    129,712.40x = 194,338.20 × 106,211.60
  4. Step 4: Simplify right side
    129,712.40x = 20,640,971,163.12
  5. Step 5: Solve for x
    x = 20,640,971,163.12/129,712.40
  6. Step 6: Final answer
    x = 159,128.74

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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.