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Finding the Fourth Proportional to 126,245.46, 189,620.40 and 78,944.70

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Solution

The fourth proportional to 126,245.46, 189,620.40 and 78,944.70 is: 118,574.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,245.46 : 189,620.40 = 78,944.70 : x
  2. Step 2: Convert to fraction form
    126,245.46/189,620.40 = 78,944.70/x
  3. Step 3: Cross multiply
    126,245.46x = 189,620.40 × 78,944.70
  4. Step 4: Simplify right side
    126,245.46x = 14,969,525,591.88
  5. Step 5: Solve for x
    x = 14,969,525,591.88/126,245.46
  6. Step 6: Final answer
    x = 118,574.76

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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.