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Finding the Fourth Proportional to 140,011, 193,209.78 and 79,589.59

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Solution

The fourth proportional to 140,011, 193,209.78 and 79,589.59 is: 109,830.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,011 : 193,209.78 = 79,589.59 : x
  2. Step 2: Convert to fraction form
    140,011/193,209.78 = 79,589.59/x
  3. Step 3: Cross multiply
    140,011x = 193,209.78 × 79,589.59
  4. Step 4: Simplify right side
    140,011x = 15,377,487,174.19
  5. Step 5: Solve for x
    x = 15,377,487,174.19/140,011
  6. Step 6: Final answer
    x = 109,830.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.