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Finding the Fourth Proportional to 128,786.64, 193,209.40 and 44,546.74

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Solution

The fourth proportional to 128,786.64, 193,209.40 and 44,546.74 is: 66,830.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,786.64 : 193,209.40 = 44,546.74 : x
  2. Step 2: Convert to fraction form
    128,786.64/193,209.40 = 44,546.74/x
  3. Step 3: Cross multiply
    128,786.64x = 193,209.40 × 44,546.74
  4. Step 4: Simplify right side
    128,786.64x = 8,606,848,480.02
  5. Step 5: Solve for x
    x = 8,606,848,480.02/128,786.64
  6. Step 6: Final answer
    x = 66,830.29

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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.