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Finding the Fourth Proportional to 139,238.80, 192,149.75 and 75,576.64

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Solution

The fourth proportional to 139,238.80, 192,149.75 and 75,576.64 is: 104,295.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,238.80 : 192,149.75 = 75,576.64 : x
  2. Step 2: Convert to fraction form
    139,238.80/192,149.75 = 75,576.64/x
  3. Step 3: Cross multiply
    139,238.80x = 192,149.75 × 75,576.64
  4. Step 4: Simplify right side
    139,238.80x = 14,522,032,481.84
  5. Step 5: Solve for x
    x = 14,522,032,481.84/139,238.80
  6. Step 6: Final answer
    x = 104,295.88

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1.5x scale

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.