Home / 126,105.39-189,214.11-66,119.49

Finding the Fourth Proportional to 126,105.39, 189,214.11 and 66,119.49

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Solution

The fourth proportional to 126,105.39, 189,214.11 and 66,119.49 is: 99,208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,105.39 : 189,214.11 = 66,119.49 : x
  2. Step 2: Convert to fraction form
    126,105.39/189,214.11 = 66,119.49/x
  3. Step 3: Cross multiply
    126,105.39x = 189,214.11 × 66,119.49
  4. Step 4: Simplify right side
    126,105.39x = 12,510,740,454.00
  5. Step 5: Solve for x
    x = 12,510,740,454.00/126,105.39
  6. Step 6: Final answer
    x = 99,208.61

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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.