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Finding the Fourth Proportional to 139,968,207.70, 209,952,311.55 and 131,010,255.70

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Solution

The fourth proportional to 139,968,207.70, 209,952,311.55 and 131,010,255.70 is: 196,515,383.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,207.70 : 209,952,311.55 = 131,010,255.70 : x
  2. Step 2: Convert to fraction form
    139,968,207.70/209,952,311.55 = 131,010,255.70/x
  3. Step 3: Cross multiply
    139,968,207.70x = 209,952,311.55 × 131,010,255.70
  4. Step 4: Simplify right side
    139,968,207.70x = 27,505,906,020,971,564
  5. Step 5: Solve for x
    x = 27,505,906,020,971,564/139,968,207.70
  6. Step 6: Final answer
    x = 196,515,383.55

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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.