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Finding the Fourth Proportional to 68,996,503.10, 103,494,754.65 and 20,481,844.70

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Solution

The fourth proportional to 68,996,503.10, 103,494,754.65 and 20,481,844.70 is: 30,722,767.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,996,503.10 : 103,494,754.65 = 20,481,844.70 : x
  2. Step 2: Convert to fraction form
    68,996,503.10/103,494,754.65 = 20,481,844.70/x
  3. Step 3: Cross multiply
    68,996,503.10x = 103,494,754.65 × 20,481,844.70
  4. Step 4: Simplify right side
    68,996,503.10x = 2,119,763,492,005,903
  5. Step 5: Solve for x
    x = 2,119,763,492,005,903/68,996,503.10
  6. Step 6: Final answer
    x = 30,722,767.05

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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.