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Finding the Fourth Proportional to 192,091.70, 288,137.55 and 81,269.30

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Solution

The fourth proportional to 192,091.70, 288,137.55 and 81,269.30 is: 121,903.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,091.70 : 288,137.55 = 81,269.30 : x
  2. Step 2: Convert to fraction form
    192,091.70/288,137.55 = 81,269.30/x
  3. Step 3: Cross multiply
    192,091.70x = 288,137.55 × 81,269.30
  4. Step 4: Simplify right side
    192,091.70x = 23,416,736,992.22
  5. Step 5: Solve for x
    x = 23,416,736,992.22/192,091.70
  6. Step 6: Final answer
    x = 121,903.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.