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Finding the Fourth Proportional to 80,589.96, 120,884.79 and 21,425.62

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Solution

The fourth proportional to 80,589.96, 120,884.79 and 21,425.62 is: 32,138.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,589.96 : 120,884.79 = 21,425.62 : x
  2. Step 2: Convert to fraction form
    80,589.96/120,884.79 = 21,425.62/x
  3. Step 3: Cross multiply
    80,589.96x = 120,884.79 × 21,425.62
  4. Step 4: Simplify right side
    80,589.96x = 2,590,031,574.32
  5. Step 5: Solve for x
    x = 2,590,031,574.32/80,589.96
  6. Step 6: Final answer
    x = 32,138.39

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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.