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Finding the Fourth Proportional to 128,190.60, 192,285.90 and 57,113.10

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Solution

The fourth proportional to 128,190.60, 192,285.90 and 57,113.10 is: 85,669.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,190.60 : 192,285.90 = 57,113.10 : x
  2. Step 2: Convert to fraction form
    128,190.60/192,285.90 = 57,113.10/x
  3. Step 3: Cross multiply
    128,190.60x = 192,285.90 × 57,113.10
  4. Step 4: Simplify right side
    128,190.60x = 10,982,043,835.29
  5. Step 5: Solve for x
    x = 10,982,043,835.29/128,190.60
  6. Step 6: Final answer
    x = 85,669.65

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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.