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Finding the Fourth Proportional to 192,901.91, 289,352.90 and 80,520.82

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Solution

The fourth proportional to 192,901.91, 289,352.90 and 80,520.82 is: 120,781.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,901.91 : 289,352.90 = 80,520.82 : x
  2. Step 2: Convert to fraction form
    192,901.91/289,352.90 = 80,520.82/x
  3. Step 3: Cross multiply
    192,901.91x = 289,352.90 × 80,520.82
  4. Step 4: Simplify right side
    192,901.91x = 23,298,932,374.77
  5. Step 5: Solve for x
    x = 23,298,932,374.77/192,901.91
  6. Step 6: Final answer
    x = 120,781.24

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1.5x scale

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.