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Finding the Fourth Proportional to 79,686.20, 119,529.38 and 20,522

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Solution

The fourth proportional to 79,686.20, 119,529.38 and 20,522 is: 30,783.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,686.20 : 119,529.38 = 20,522 : x
  2. Step 2: Convert to fraction form
    79,686.20/119,529.38 = 20,522/x
  3. Step 3: Cross multiply
    79,686.20x = 119,529.38 × 20,522
  4. Step 4: Simplify right side
    79,686.20x = 2,452,981,936.36
  5. Step 5: Solve for x
    x = 2,452,981,936.36/79,686.20
  6. Step 6: Final answer
    x = 30,783.02

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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.