Home / 126,039.20-189,131.70-47,161.40

Finding the Fourth Proportional to 126,039.20, 189,131.70 and 47,161.40

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Solution

The fourth proportional to 126,039.20, 189,131.70 and 47,161.40 is: 70,769.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,039.20 : 189,131.70 = 47,161.40 : x
  2. Step 2: Convert to fraction form
    126,039.20/189,131.70 = 47,161.40/x
  3. Step 3: Cross multiply
    126,039.20x = 189,131.70 × 47,161.40
  4. Step 4: Simplify right side
    126,039.20x = 8,919,715,756.38
  5. Step 5: Solve for x
    x = 8,919,715,756.38/126,039.20
  6. Step 6: Final answer
    x = 70,769.38

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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.