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Finding the Fourth Proportional to 139,793.64, 191,830.17 and 127,121.64

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Solution

The fourth proportional to 139,793.64, 191,830.17 and 127,121.64 is: 174,441.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,793.64 : 191,830.17 = 127,121.64 : x
  2. Step 2: Convert to fraction form
    139,793.64/191,830.17 = 127,121.64/x
  3. Step 3: Cross multiply
    139,793.64x = 191,830.17 × 127,121.64
  4. Step 4: Simplify right side
    139,793.64x = 24,385,765,811.88
  5. Step 5: Solve for x
    x = 24,385,765,811.88/139,793.64
  6. Step 6: Final answer
    x = 174,441.17

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.