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Finding the Fourth Proportional to 128,805.30, 193,171.03 and 43,406.85

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Solution

The fourth proportional to 128,805.30, 193,171.03 and 43,406.85 is: 65,097.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,805.30 : 193,171.03 = 43,406.85 : x
  2. Step 2: Convert to fraction form
    128,805.30/193,171.03 = 43,406.85/x
  3. Step 3: Cross multiply
    128,805.30x = 193,171.03 × 43,406.85
  4. Step 4: Simplify right side
    128,805.30x = 8,384,946,539.43
  5. Step 5: Solve for x
    x = 8,384,946,539.43/128,805.30
  6. Step 6: Final answer
    x = 65,097.84

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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.