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Finding the Fourth Proportional to 205,571.60, 308,150.40 and 85,694.92

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Solution

The fourth proportional to 205,571.60, 308,150.40 and 85,694.92 is: 128,456.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,571.60 : 308,150.40 = 85,694.92 : x
  2. Step 2: Convert to fraction form
    205,571.60/308,150.40 = 85,694.92/x
  3. Step 3: Cross multiply
    205,571.60x = 308,150.40 × 85,694.92
  4. Step 4: Simplify right side
    205,571.60x = 26,406,925,352.61
  5. Step 5: Solve for x
    x = 26,406,925,352.61/205,571.60
  6. Step 6: Final answer
    x = 128,456.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.