Home / 143,198.69-197,619.14-79,542.41

Finding the Fourth Proportional to 143,198.69, 197,619.14 and 79,542.41

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Solution

The fourth proportional to 143,198.69, 197,619.14 and 79,542.41 is: 109,771.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,198.69 : 197,619.14 = 79,542.41 : x
  2. Step 2: Convert to fraction form
    143,198.69/197,619.14 = 79,542.41/x
  3. Step 3: Cross multiply
    143,198.69x = 197,619.14 × 79,542.41
  4. Step 4: Simplify right side
    143,198.69x = 15,719,101,868.49
  5. Step 5: Solve for x
    x = 15,719,101,868.49/143,198.69
  6. Step 6: Final answer
    x = 109,771.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.