Home / 126,246.46-189,621.90-78,945.70

Finding the Fourth Proportional to 126,246.46, 189,621.90 and 78,945.70

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Solution

The fourth proportional to 126,246.46, 189,621.90 and 78,945.70 is: 118,576.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,246.46 : 189,621.90 = 78,945.70 : x
  2. Step 2: Convert to fraction form
    126,246.46/189,621.90 = 78,945.70/x
  3. Step 3: Cross multiply
    126,246.46x = 189,621.90 × 78,945.70
  4. Step 4: Simplify right side
    126,246.46x = 14,969,833,630.83
  5. Step 5: Solve for x
    x = 14,969,833,630.83/126,246.46
  6. Step 6: Final answer
    x = 118,576.26

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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.