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Finding the Fourth Proportional to 79,543.28, 119,305.94 and 20,379.40

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Solution

The fourth proportional to 79,543.28, 119,305.94 and 20,379.40 is: 30,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,543.28 : 119,305.94 = 20,379.40 : x
  2. Step 2: Convert to fraction form
    79,543.28/119,305.94 = 20,379.40/x
  3. Step 3: Cross multiply
    79,543.28x = 119,305.94 × 20,379.40
  4. Step 4: Simplify right side
    79,543.28x = 2,431,383,473.64
  5. Step 5: Solve for x
    x = 2,431,383,473.64/79,543.28
  6. Step 6: Final answer
    x = 30,566.80

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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.