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Finding the Fourth Proportional to 71,570.20, 107,268.90 and 36,491.80

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Solution

The fourth proportional to 71,570.20, 107,268.90 and 36,491.80 is: 54,693.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,570.20 : 107,268.90 = 36,491.80 : x
  2. Step 2: Convert to fraction form
    71,570.20/107,268.90 = 36,491.80/x
  3. Step 3: Cross multiply
    71,570.20x = 107,268.90 × 36,491.80
  4. Step 4: Simplify right side
    71,570.20x = 3,914,435,245.02
  5. Step 5: Solve for x
    x = 3,914,435,245.02/71,570.20
  6. Step 6: Final answer
    x = 54,693.65

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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.