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Finding the Fourth Proportional to 199,887.71, 275,818.39 and 128,364.62

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Solution

The fourth proportional to 199,887.71, 275,818.39 and 128,364.62 is: 177,126.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,887.71 : 275,818.39 = 128,364.62 : x
  2. Step 2: Convert to fraction form
    199,887.71/275,818.39 = 128,364.62/x
  3. Step 3: Cross multiply
    199,887.71x = 275,818.39 × 128,364.62
  4. Step 4: Simplify right side
    199,887.71x = 35,405,321,121.36
  5. Step 5: Solve for x
    x = 35,405,321,121.36/199,887.71
  6. Step 6: Final answer
    x = 177,126.05

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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.