Home / 126,243.46-189,617.37-78,942.70

Finding the Fourth Proportional to 126,243.46, 189,617.37 and 78,942.70

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Solution

The fourth proportional to 126,243.46, 189,617.37 and 78,942.70 is: 118,571.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,243.46 : 189,617.37 = 78,942.70 : x
  2. Step 2: Convert to fraction form
    126,243.46/189,617.37 = 78,942.70/x
  3. Step 3: Cross multiply
    126,243.46x = 189,617.37 × 78,942.70
  4. Step 4: Simplify right side
    126,243.46x = 14,968,907,154.70
  5. Step 5: Solve for x
    x = 14,968,907,154.70/126,243.46
  6. Step 6: Final answer
    x = 118,571.74

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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.