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Finding the Fourth Proportional to 71,380.62, 107,072.15 and 18,788.13

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Solution

The fourth proportional to 71,380.62, 107,072.15 and 18,788.13 is: 28,182.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,380.62 : 107,072.15 = 18,788.13 : x
  2. Step 2: Convert to fraction form
    71,380.62/107,072.15 = 18,788.13/x
  3. Step 3: Cross multiply
    71,380.62x = 107,072.15 × 18,788.13
  4. Step 4: Simplify right side
    71,380.62x = 2,011,685,379.64
  5. Step 5: Solve for x
    x = 2,011,685,379.64/71,380.62
  6. Step 6: Final answer
    x = 28,182.51

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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.