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Finding the Fourth Proportional to 129,799.80, 194,699.70 and 82,913.40

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Solution

The fourth proportional to 129,799.80, 194,699.70 and 82,913.40 is: 124,370.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,799.80 : 194,699.70 = 82,913.40 : x
  2. Step 2: Convert to fraction form
    129,799.80/194,699.70 = 82,913.40/x
  3. Step 3: Cross multiply
    129,799.80x = 194,699.70 × 82,913.40
  4. Step 4: Simplify right side
    129,799.80x = 16,143,214,105.98
  5. Step 5: Solve for x
    x = 16,143,214,105.98/129,799.80
  6. Step 6: Final answer
    x = 124,370.10

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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.