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Finding the Fourth Proportional to 200,068.80, 276,131.88 and 128,538.24

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Solution

The fourth proportional to 200,068.80, 276,131.88 and 128,538.24 is: 177,406.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,068.80 : 276,131.88 = 128,538.24 : x
  2. Step 2: Convert to fraction form
    200,068.80/276,131.88 = 128,538.24/x
  3. Step 3: Cross multiply
    200,068.80x = 276,131.88 × 128,538.24
  4. Step 4: Simplify right side
    200,068.80x = 35,493,505,863.09
  5. Step 5: Solve for x
    x = 35,493,505,863.09/200,068.80
  6. Step 6: Final answer
    x = 177,406.50

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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.