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Finding the Fourth Proportional to 139,205.10, 192,103.56 and 75,542.88

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Solution

The fourth proportional to 139,205.10, 192,103.56 and 75,542.88 is: 104,249.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,205.10 : 192,103.56 = 75,542.88 : x
  2. Step 2: Convert to fraction form
    139,205.10/192,103.56 = 75,542.88/x
  3. Step 3: Cross multiply
    139,205.10x = 192,103.56 × 75,542.88
  4. Step 4: Simplify right side
    139,205.10x = 14,512,056,180.65
  5. Step 5: Solve for x
    x = 14,512,056,180.65/139,205.10
  6. Step 6: Final answer
    x = 104,249.46

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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.