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Finding the Fourth Proportional to 73,197.60, 109,801.20 and 20,608.80

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Solution

The fourth proportional to 73,197.60, 109,801.20 and 20,608.80 is: 30,914.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,197.60 : 109,801.20 = 20,608.80 : x
  2. Step 2: Convert to fraction form
    73,197.60/109,801.20 = 20,608.80/x
  3. Step 3: Cross multiply
    73,197.60x = 109,801.20 × 20,608.80
  4. Step 4: Simplify right side
    73,197.60x = 2,262,870,970.56
  5. Step 5: Solve for x
    x = 2,262,870,970.56/73,197.60
  6. Step 6: Final answer
    x = 30,914.55

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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.