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Finding the Fourth Proportional to 80,561.76, 120,859.92 and 33,787.68

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Solution

The fourth proportional to 80,561.76, 120,859.92 and 33,787.68 is: 50,688.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,561.76 : 120,859.92 = 33,787.68 : x
  2. Step 2: Convert to fraction form
    80,561.76/120,859.92 = 33,787.68/x
  3. Step 3: Cross multiply
    80,561.76x = 120,859.92 × 33,787.68
  4. Step 4: Simplify right side
    80,561.76x = 4,083,576,301.79
  5. Step 5: Solve for x
    x = 4,083,576,301.79/80,561.76
  6. Step 6: Final answer
    x = 50,688.77

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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.