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Finding the Fourth Proportional to 128,793.60, 193,190.40 and 57,716.10

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Solution

The fourth proportional to 128,793.60, 193,190.40 and 57,716.10 is: 86,574.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,793.60 : 193,190.40 = 57,716.10 : x
  2. Step 2: Convert to fraction form
    128,793.60/193,190.40 = 57,716.10/x
  3. Step 3: Cross multiply
    128,793.60x = 193,190.40 × 57,716.10
  4. Step 4: Simplify right side
    128,793.60x = 11,150,196,445.44
  5. Step 5: Solve for x
    x = 11,150,196,445.44/128,793.60
  6. Step 6: Final answer
    x = 86,574.15

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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.