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Finding the Fourth Proportional to 192,989.80, 289,311.90 and 126,461.80

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Solution

The fourth proportional to 192,989.80, 289,311.90 and 126,461.80 is: 189,579.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,989.80 : 289,311.90 = 126,461.80 : x
  2. Step 2: Convert to fraction form
    192,989.80/289,311.90 = 126,461.80/x
  3. Step 3: Cross multiply
    192,989.80x = 289,311.90 × 126,461.80
  4. Step 4: Simplify right side
    192,989.80x = 36,586,903,635.42
  5. Step 5: Solve for x
    x = 36,586,903,635.42/192,989.80
  6. Step 6: Final answer
    x = 189,579.47

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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.