Home / 129,057.05-178,163.46-80,685.83

Finding the Fourth Proportional to 129,057.05, 178,163.46 and 80,685.83

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Solution

The fourth proportional to 129,057.05, 178,163.46 and 80,685.83 is: 111,386.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,057.05 : 178,163.46 = 80,685.83 : x
  2. Step 2: Convert to fraction form
    129,057.05/178,163.46 = 80,685.83/x
  3. Step 3: Cross multiply
    129,057.05x = 178,163.46 × 80,685.83
  4. Step 4: Simplify right side
    129,057.05x = 14,375,265,754.95
  5. Step 5: Solve for x
    x = 14,375,265,754.95/129,057.05
  6. Step 6: Final answer
    x = 111,386.91

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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.