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Finding the Fourth Proportional to 128,843.44, 177,783.44 and 83,583.48

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Solution

The fourth proportional to 128,843.44, 177,783.44 and 83,583.48 is: 115,331.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,843.44 : 177,783.44 = 83,583.48 : x
  2. Step 2: Convert to fraction form
    128,843.44/177,783.44 = 83,583.48/x
  3. Step 3: Cross multiply
    128,843.44x = 177,783.44 × 83,583.48
  4. Step 4: Simplify right side
    128,843.44x = 14,859,758,601.57
  5. Step 5: Solve for x
    x = 14,859,758,601.57/128,843.44
  6. Step 6: Final answer
    x = 115,331.90

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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.