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Finding the Fourth Proportional to 71,462.87, 98,620.63 and 39,198.90

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Solution

The fourth proportional to 71,462.87, 98,620.63 and 39,198.90 is: 54,095.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,462.87 : 98,620.63 = 39,198.90 : x
  2. Step 2: Convert to fraction form
    71,462.87/98,620.63 = 39,198.90/x
  3. Step 3: Cross multiply
    71,462.87x = 98,620.63 × 39,198.90
  4. Step 4: Simplify right side
    71,462.87x = 3,865,820,137.99
  5. Step 5: Solve for x
    x = 3,865,820,137.99/71,462.87
  6. Step 6: Final answer
    x = 54,095.50

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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.