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Finding the Fourth Proportional to 68,996,503.60, 103,494,755.40 and 20,481,845.20

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Solution

The fourth proportional to 68,996,503.60, 103,494,755.40 and 20,481,845.20 is: 30,722,767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,996,503.60 : 103,494,755.40 = 20,481,845.20 : x
  2. Step 2: Convert to fraction form
    68,996,503.60/103,494,755.40 = 20,481,845.20/x
  3. Step 3: Cross multiply
    68,996,503.60x = 103,494,755.40 × 20,481,845.20
  4. Step 4: Simplify right side
    68,996,503.60x = 2,119,763,559,114,664
  5. Step 5: Solve for x
    x = 2,119,763,559,114,664/68,996,503.60
  6. Step 6: Final answer
    x = 30,722,767.80

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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.