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Finding the Fourth Proportional to 118,207.70, 177,311.55 and 91,769.30

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Solution

The fourth proportional to 118,207.70, 177,311.55 and 91,769.30 is: 137,653.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,207.70 : 177,311.55 = 91,769.30 : x
  2. Step 2: Convert to fraction form
    118,207.70/177,311.55 = 91,769.30/x
  3. Step 3: Cross multiply
    118,207.70x = 177,311.55 × 91,769.30
  4. Step 4: Simplify right side
    118,207.70x = 16,271,756,825.42
  5. Step 5: Solve for x
    x = 16,271,756,825.42/118,207.70
  6. Step 6: Final answer
    x = 137,653.95

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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.