Home / 139,143.85-192,018.89-75,481.65

Finding the Fourth Proportional to 139,143.85, 192,018.89 and 75,481.65

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Solution

The fourth proportional to 139,143.85, 192,018.89 and 75,481.65 is: 104,164.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,143.85 : 192,018.89 = 75,481.65 : x
  2. Step 2: Convert to fraction form
    139,143.85/192,018.89 = 75,481.65/x
  3. Step 3: Cross multiply
    139,143.85x = 192,018.89 × 75,481.65
  4. Step 4: Simplify right side
    139,143.85x = 14,493,901,872.44
  5. Step 5: Solve for x
    x = 14,493,901,872.44/139,143.85
  6. Step 6: Final answer
    x = 104,164.88

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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.