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Finding the Fourth Proportional to 192,783.20, 289,160.40 and 80,434.40

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Solution

The fourth proportional to 192,783.20, 289,160.40 and 80,434.40 is: 120,645.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,783.20 : 289,160.40 = 80,434.40 : x
  2. Step 2: Convert to fraction form
    192,783.20/289,160.40 = 80,434.40/x
  3. Step 3: Cross multiply
    192,783.20x = 289,160.40 × 80,434.40
  4. Step 4: Simplify right side
    192,783.20x = 23,258,443,277.76
  5. Step 5: Solve for x
    x = 23,258,443,277.76/192,783.20
  6. Step 6: Final answer
    x = 120,645.59

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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.