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Finding the Fourth Proportional to 80,429.80, 120,623.10 and 33,687.40

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Solution

The fourth proportional to 80,429.80, 120,623.10 and 33,687.40 is: 50,522.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,429.80 : 120,623.10 = 33,687.40 : x
  2. Step 2: Convert to fraction form
    80,429.80/120,623.10 = 33,687.40/x
  3. Step 3: Cross multiply
    80,429.80x = 120,623.10 × 33,687.40
  4. Step 4: Simplify right side
    80,429.80x = 4,063,478,618.94
  5. Step 5: Solve for x
    x = 4,063,478,618.94/80,429.80
  6. Step 6: Final answer
    x = 50,522.05

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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.