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Finding the Fourth Proportional to 71,380.72, 107,062.57 and 18,794.31

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Solution

The fourth proportional to 71,380.72, 107,062.57 and 18,794.31 is: 28,189.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,380.72 : 107,062.57 = 18,794.31 : x
  2. Step 2: Convert to fraction form
    71,380.72/107,062.57 = 18,794.31/x
  3. Step 3: Cross multiply
    71,380.72x = 107,062.57 × 18,794.31
  4. Step 4: Simplify right side
    71,380.72x = 2,012,167,129.98
  5. Step 5: Solve for x
    x = 2,012,167,129.98/71,380.72
  6. Step 6: Final answer
    x = 28,189.22

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1.5x scale

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.