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Finding the Fourth Proportional to 129,816.70, 194,779.73 and 70,694.80

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Solution

The fourth proportional to 129,816.70, 194,779.73 and 70,694.80 is: 106,071.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,816.70 : 194,779.73 = 70,694.80 : x
  2. Step 2: Convert to fraction form
    129,816.70/194,779.73 = 70,694.80/x
  3. Step 3: Cross multiply
    129,816.70x = 194,779.73 × 70,694.80
  4. Step 4: Simplify right side
    129,816.70x = 13,769,914,056.40
  5. Step 5: Solve for x
    x = 13,769,914,056.40/129,816.70
  6. Step 6: Final answer
    x = 106,071.98

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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.