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Finding the Fourth Proportional to 68,681,727.60, 103,022,591.40 and 20,806,450.80

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Solution

The fourth proportional to 68,681,727.60, 103,022,591.40 and 20,806,450.80 is: 31,209,676.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,681,727.60 : 103,022,591.40 = 20,806,450.80 : x
  2. Step 2: Convert to fraction form
    68,681,727.60/103,022,591.40 = 20,806,450.80/x
  3. Step 3: Cross multiply
    68,681,727.60x = 103,022,591.40 × 20,806,450.80
  4. Step 4: Simplify right side
    68,681,727.60x = 2,143,534,479,252,603.25
  5. Step 5: Solve for x
    x = 2,143,534,479,252,603.25/68,681,727.60
  6. Step 6: Final answer
    x = 31,209,676.20

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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.