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Finding the Fourth Proportional to 139,811.96, 192,959.55 and 82,467.48

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Solution

The fourth proportional to 139,811.96, 192,959.55 and 82,467.48 is: 113,816.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,811.96 : 192,959.55 = 82,467.48 : x
  2. Step 2: Convert to fraction form
    139,811.96/192,959.55 = 82,467.48/x
  3. Step 3: Cross multiply
    139,811.96x = 192,959.55 × 82,467.48
  4. Step 4: Simplify right side
    139,811.96x = 15,912,887,830.43
  5. Step 5: Solve for x
    x = 15,912,887,830.43/139,811.96
  6. Step 6: Final answer
    x = 113,816.36

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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.