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Finding the Fourth Proportional to 71,786.38, 99,063.44 and 39,520.73

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Solution

The fourth proportional to 71,786.38, 99,063.44 and 39,520.73 is: 54,537.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,786.38 : 99,063.44 = 39,520.73 : x
  2. Step 2: Convert to fraction form
    71,786.38/99,063.44 = 39,520.73/x
  3. Step 3: Cross multiply
    71,786.38x = 99,063.44 × 39,520.73
  4. Step 4: Simplify right side
    71,786.38x = 3,915,059,465.11
  5. Step 5: Solve for x
    x = 3,915,059,465.11/71,786.38
  6. Step 6: Final answer
    x = 54,537.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.