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Finding the Fourth Proportional to 71,216.62, 106,821.01 and 21,297.13

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Solution

The fourth proportional to 71,216.62, 106,821.01 and 21,297.13 is: 31,944.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,216.62 : 106,821.01 = 21,297.13 : x
  2. Step 2: Convert to fraction form
    71,216.62/106,821.01 = 21,297.13/x
  3. Step 3: Cross multiply
    71,216.62x = 106,821.01 × 21,297.13
  4. Step 4: Simplify right side
    71,216.62x = 2,274,980,936.70
  5. Step 5: Solve for x
    x = 2,274,980,936.70/71,216.62
  6. Step 6: Final answer
    x = 31,944.52

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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.