Home / 207,998.28-311,385.06-128,858.04

Finding the Fourth Proportional to 207,998.28, 311,385.06 and 128,858.04

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Solution

The fourth proportional to 207,998.28, 311,385.06 and 128,858.04 is: 192,907.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,998.28 : 311,385.06 = 128,858.04 : x
  2. Step 2: Convert to fraction form
    207,998.28/311,385.06 = 128,858.04/x
  3. Step 3: Cross multiply
    207,998.28x = 311,385.06 × 128,858.04
  4. Step 4: Simplify right side
    207,998.28x = 40,124,468,516.88
  5. Step 5: Solve for x
    x = 40,124,468,516.88/207,998.28
  6. Step 6: Final answer
    x = 192,907.69

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1.5x scale

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.