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Finding the Fourth Proportional to 79,542.66, 119,311.22 and 20,378.90

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Solution

The fourth proportional to 79,542.66, 119,311.22 and 20,378.90 is: 30,567.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,542.66 : 119,311.22 = 20,378.90 : x
  2. Step 2: Convert to fraction form
    79,542.66/119,311.22 = 20,378.90/x
  3. Step 3: Cross multiply
    79,542.66x = 119,311.22 × 20,378.90
  4. Step 4: Simplify right side
    79,542.66x = 2,431,431,421.26
  5. Step 5: Solve for x
    x = 2,431,431,421.26/79,542.66
  6. Step 6: Final answer
    x = 30,567.64

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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.