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Finding the Fourth Proportional to 136,611.92, 188,481.48 and 82,139.60

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Solution

The fourth proportional to 136,611.92, 188,481.48 and 82,139.60 is: 113,326.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,611.92 : 188,481.48 = 82,139.60 : x
  2. Step 2: Convert to fraction form
    136,611.92/188,481.48 = 82,139.60/x
  3. Step 3: Cross multiply
    136,611.92x = 188,481.48 × 82,139.60
  4. Step 4: Simplify right side
    136,611.92x = 15,481,793,374.61
  5. Step 5: Solve for x
    x = 15,481,793,374.61/136,611.92
  6. Step 6: Final answer
    x = 113,326.81

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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.