Home / 200,185.78-276,100.35-128,572.46

Finding the Fourth Proportional to 200,185.78, 276,100.35 and 128,572.46

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Solution

The fourth proportional to 200,185.78, 276,100.35 and 128,572.46 is: 177,329.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,185.78 : 276,100.35 = 128,572.46 : x
  2. Step 2: Convert to fraction form
    200,185.78/276,100.35 = 128,572.46/x
  3. Step 3: Cross multiply
    200,185.78x = 276,100.35 × 128,572.46
  4. Step 4: Simplify right side
    200,185.78x = 35,498,901,206.36
  5. Step 5: Solve for x
    x = 35,498,901,206.36/200,185.78
  6. Step 6: Final answer
    x = 177,329.78

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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.