Home / 128,806.20-193,119.30-76,188.60

Finding the Fourth Proportional to 128,806.20, 193,119.30 and 76,188.60

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Solution

The fourth proportional to 128,806.20, 193,119.30 and 76,188.60 is: 114,229.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,806.20 : 193,119.30 = 76,188.60 : x
  2. Step 2: Convert to fraction form
    128,806.20/193,119.30 = 76,188.60/x
  3. Step 3: Cross multiply
    128,806.20x = 193,119.30 × 76,188.60
  4. Step 4: Simplify right side
    128,806.20x = 14,713,489,099.98
  5. Step 5: Solve for x
    x = 14,713,489,099.98/128,806.20
  6. Step 6: Final answer
    x = 114,229.67

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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.