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Finding the Fourth Proportional to 71,974.75, 99,321.68 and 39,267.22

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Solution

The fourth proportional to 71,974.75, 99,321.68 and 39,267.22 is: 54,186.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,974.75 : 99,321.68 = 39,267.22 : x
  2. Step 2: Convert to fraction form
    71,974.75/99,321.68 = 39,267.22/x
  3. Step 3: Cross multiply
    71,974.75x = 99,321.68 × 39,267.22
  4. Step 4: Simplify right side
    71,974.75x = 3,900,086,259.33
  5. Step 5: Solve for x
    x = 3,900,086,259.33/71,974.75
  6. Step 6: Final answer
    x = 54,186.87

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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.