Home / 205,200.05-283,180.82-128,722.37

Finding the Fourth Proportional to 205,200.05, 283,180.82 and 128,722.37

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Solution

The fourth proportional to 205,200.05, 283,180.82 and 128,722.37 is: 177,639.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,200.05 : 283,180.82 = 128,722.37 : x
  2. Step 2: Convert to fraction form
    205,200.05/283,180.82 = 128,722.37/x
  3. Step 3: Cross multiply
    205,200.05x = 283,180.82 × 128,722.37
  4. Step 4: Simplify right side
    205,200.05x = 36,451,704,229.43
  5. Step 5: Solve for x
    x = 36,451,704,229.43/205,200.05
  6. Step 6: Final answer
    x = 177,639.85

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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.