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Finding the Fourth Proportional to 71,479,265.20, 107,218,897.80 and 20,360,618.80

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Solution

The fourth proportional to 71,479,265.20, 107,218,897.80 and 20,360,618.80 is: 30,540,928.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,479,265.20 : 107,218,897.80 = 20,360,618.80 : x
  2. Step 2: Convert to fraction form
    71,479,265.20/107,218,897.80 = 20,360,618.80/x
  3. Step 3: Cross multiply
    71,479,265.20x = 107,218,897.80 × 20,360,618.80
  4. Step 4: Simplify right side
    71,479,265.20x = 2,183,043,106,261,958.75
  5. Step 5: Solve for x
    x = 2,183,043,106,261,958.75/71,479,265.20
  6. Step 6: Final answer
    x = 30,540,928.20

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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.