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Finding the Fourth Proportional to 68,994,069.60, 103,491,104.40 and 20,479,411.20

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Solution

The fourth proportional to 68,994,069.60, 103,491,104.40 and 20,479,411.20 is: 30,719,116.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,994,069.60 : 103,491,104.40 = 20,479,411.20 : x
  2. Step 2: Convert to fraction form
    68,994,069.60/103,491,104.40 = 20,479,411.20/x
  3. Step 3: Cross multiply
    68,994,069.60x = 103,491,104.40 × 20,479,411.20
  4. Step 4: Simplify right side
    68,994,069.60x = 2,119,436,882,549,729.25
  5. Step 5: Solve for x
    x = 2,119,436,882,549,729.25/68,994,069.60
  6. Step 6: Final answer
    x = 30,719,116.80

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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.