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Finding the Fourth Proportional to 80,993.68, 121,499.16 and 34,251.28

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Solution

The fourth proportional to 80,993.68, 121,499.16 and 34,251.28 is: 51,380.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,993.68 : 121,499.16 = 34,251.28 : x
  2. Step 2: Convert to fraction form
    80,993.68/121,499.16 = 34,251.28/x
  3. Step 3: Cross multiply
    80,993.68x = 121,499.16 × 34,251.28
  4. Step 4: Simplify right side
    80,993.68x = 4,161,501,748.92
  5. Step 5: Solve for x
    x = 4,161,501,748.92/80,993.68
  6. Step 6: Final answer
    x = 51,380.57

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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.