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Finding the Fourth Proportional to 139,865.91, 193,086.44 and 94,782.09

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Solution

The fourth proportional to 139,865.91, 193,086.44 and 94,782.09 is: 130,847.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,865.91 : 193,086.44 = 94,782.09 : x
  2. Step 2: Convert to fraction form
    139,865.91/193,086.44 = 94,782.09/x
  3. Step 3: Cross multiply
    139,865.91x = 193,086.44 × 94,782.09
  4. Step 4: Simplify right side
    139,865.91x = 18,301,135,859.95
  5. Step 5: Solve for x
    x = 18,301,135,859.95/139,865.91
  6. Step 6: Final answer
    x = 130,847.72

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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.