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Finding the Fourth Proportional to 80,579.52, 120,859.68 and 21,419.52

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Solution

The fourth proportional to 80,579.52, 120,859.68 and 21,419.52 is: 32,126.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,579.52 : 120,859.68 = 21,419.52 : x
  2. Step 2: Convert to fraction form
    80,579.52/120,859.68 = 21,419.52/x
  3. Step 3: Cross multiply
    80,579.52x = 120,859.68 × 21,419.52
  4. Step 4: Simplify right side
    80,579.52x = 2,588,756,332.95
  5. Step 5: Solve for x
    x = 2,588,756,332.95/80,579.52
  6. Step 6: Final answer
    x = 32,126.73

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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.