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Finding the Fourth Proportional to 128,683.20, 193,024.80 and 35,198.40

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Solution

The fourth proportional to 128,683.20, 193,024.80 and 35,198.40 is: 52,797.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,683.20 : 193,024.80 = 35,198.40 : x
  2. Step 2: Convert to fraction form
    128,683.20/193,024.80 = 35,198.40/x
  3. Step 3: Cross multiply
    128,683.20x = 193,024.80 × 35,198.40
  4. Step 4: Simplify right side
    128,683.20x = 6,794,164,120.32
  5. Step 5: Solve for x
    x = 6,794,164,120.32/128,683.20
  6. Step 6: Final answer
    x = 52,797.60

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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.