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Finding the Fourth Proportional to 139,377.92, 192,342.08 and 82,019.48

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Solution

The fourth proportional to 139,377.92, 192,342.08 and 82,019.48 is: 113,187.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,377.92 : 192,342.08 = 82,019.48 : x
  2. Step 2: Convert to fraction form
    139,377.92/192,342.08 = 82,019.48/x
  3. Step 3: Cross multiply
    139,377.92x = 192,342.08 × 82,019.48
  4. Step 4: Simplify right side
    139,377.92x = 15,775,797,383.72
  5. Step 5: Solve for x
    x = 15,775,797,383.72/139,377.92
  6. Step 6: Final answer
    x = 113,187.21

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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.