Home / 128,896.20-177,940.26-81,222.84

Finding the Fourth Proportional to 128,896.20, 177,940.26 and 81,222.84

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Solution

The fourth proportional to 128,896.20, 177,940.26 and 81,222.84 is: 112,127.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,896.20 : 177,940.26 = 81,222.84 : x
  2. Step 2: Convert to fraction form
    128,896.20/177,940.26 = 81,222.84/x
  3. Step 3: Cross multiply
    128,896.20x = 177,940.26 × 81,222.84
  4. Step 4: Simplify right side
    128,896.20x = 14,452,813,267.54
  5. Step 5: Solve for x
    x = 14,452,813,267.54/128,896.20
  6. Step 6: Final answer
    x = 112,127.54

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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.