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Finding the Fourth Proportional to 71,356.80, 107,035.20 and 21,444.60

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Solution

The fourth proportional to 71,356.80, 107,035.20 and 21,444.60 is: 32,166.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,356.80 : 107,035.20 = 21,444.60 : x
  2. Step 2: Convert to fraction form
    71,356.80/107,035.20 = 21,444.60/x
  3. Step 3: Cross multiply
    71,356.80x = 107,035.20 × 21,444.60
  4. Step 4: Simplify right side
    71,356.80x = 2,295,327,049.92
  5. Step 5: Solve for x
    x = 2,295,327,049.92/71,356.80
  6. Step 6: Final answer
    x = 32,166.90

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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.