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Finding the Fourth Proportional to 129,783.40, 194,675.10 and 91,729.60

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Solution

The fourth proportional to 129,783.40, 194,675.10 and 91,729.60 is: 137,594.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,783.40 : 194,675.10 = 91,729.60 : x
  2. Step 2: Convert to fraction form
    129,783.40/194,675.10 = 91,729.60/x
  3. Step 3: Cross multiply
    129,783.40x = 194,675.10 × 91,729.60
  4. Step 4: Simplify right side
    129,783.40x = 17,857,469,052.96
  5. Step 5: Solve for x
    x = 17,857,469,052.96/129,783.40
  6. Step 6: Final answer
    x = 137,594.40

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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.