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Finding the Fourth Proportional to 73,900.73, 101,982.99 and 39,909.21

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Solution

The fourth proportional to 73,900.73, 101,982.99 and 39,909.21 is: 55,074.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,900.73 : 101,982.99 = 39,909.21 : x
  2. Step 2: Convert to fraction form
    73,900.73/101,982.99 = 39,909.21/x
  3. Step 3: Cross multiply
    73,900.73x = 101,982.99 × 39,909.21
  4. Step 4: Simplify right side
    73,900.73x = 4,070,060,919.07
  5. Step 5: Solve for x
    x = 4,070,060,919.07/73,900.73
  6. Step 6: Final answer
    x = 55,074.71

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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.