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Finding the Fourth Proportional to 80,485.80, 120,744.90 and 27,884.40

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Solution

The fourth proportional to 80,485.80, 120,744.90 and 27,884.40 is: 41,832.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,485.80 : 120,744.90 = 27,884.40 : x
  2. Step 2: Convert to fraction form
    80,485.80/120,744.90 = 27,884.40/x
  3. Step 3: Cross multiply
    80,485.80x = 120,744.90 × 27,884.40
  4. Step 4: Simplify right side
    80,485.80x = 3,366,899,089.56
  5. Step 5: Solve for x
    x = 3,366,899,089.56/80,485.80
  6. Step 6: Final answer
    x = 41,832.21

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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.