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Finding the Fourth Proportional to 67,270.72, 100,905.80 and 20,523.44

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Solution

The fourth proportional to 67,270.72, 100,905.80 and 20,523.44 is: 30,785.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,270.72 : 100,905.80 = 20,523.44 : x
  2. Step 2: Convert to fraction form
    67,270.72/100,905.80 = 20,523.44/x
  3. Step 3: Cross multiply
    67,270.72x = 100,905.80 × 20,523.44
  4. Step 4: Simplify right side
    67,270.72x = 2,070,934,131.95
  5. Step 5: Solve for x
    x = 2,070,934,131.95/67,270.72
  6. Step 6: Final answer
    x = 30,785.07

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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.