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Finding the Fourth Proportional to 79,568.88, 119,344.42 and 20,405.94

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Solution

The fourth proportional to 79,568.88, 119,344.42 and 20,405.94 is: 30,606.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,568.88 : 119,344.42 = 20,405.94 : x
  2. Step 2: Convert to fraction form
    79,568.88/119,344.42 = 20,405.94/x
  3. Step 3: Cross multiply
    79,568.88x = 119,344.42 × 20,405.94
  4. Step 4: Simplify right side
    79,568.88x = 2,435,335,073.85
  5. Step 5: Solve for x
    x = 2,435,335,073.85/79,568.88
  6. Step 6: Final answer
    x = 30,606.63

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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.