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Finding the Fourth Proportional to 128,105.70, 192,158.55 and 44,999.70

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Solution

The fourth proportional to 128,105.70, 192,158.55 and 44,999.70 is: 67,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,105.70 : 192,158.55 = 44,999.70 : x
  2. Step 2: Convert to fraction form
    128,105.70/192,158.55 = 44,999.70/x
  3. Step 3: Cross multiply
    128,105.70x = 192,158.55 × 44,999.70
  4. Step 4: Simplify right side
    128,105.70x = 8,647,077,102.44
  5. Step 5: Solve for x
    x = 8,647,077,102.44/128,105.70
  6. Step 6: Final answer
    x = 67,499.55

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Half scale
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Double scale
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Similar ratio
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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.