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Finding the Fourth Proportional to 99,698.06, 137,505.53 and 63,891.39

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Solution

The fourth proportional to 99,698.06, 137,505.53 and 63,891.39 is: 88,120.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,698.06 : 137,505.53 = 63,891.39 : x
  2. Step 2: Convert to fraction form
    99,698.06/137,505.53 = 63,891.39/x
  3. Step 3: Cross multiply
    99,698.06x = 137,505.53 × 63,891.39
  4. Step 4: Simplify right side
    99,698.06x = 8,785,419,124.93
  5. Step 5: Solve for x
    x = 8,785,419,124.93/99,698.06
  6. Step 6: Final answer
    x = 88,120.27

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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.