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Finding the Fourth Proportional to 68,691,863.20, 102,949,321.20 and 52,656,023.20

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Solution

The fourth proportional to 68,691,863.20, 102,949,321.20 and 52,656,023.20 is: 78,916,215.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,691,863.20 : 102,949,321.20 = 52,656,023.20 : x
  2. Step 2: Convert to fraction form
    68,691,863.20/102,949,321.20 = 52,656,023.20/x
  3. Step 3: Cross multiply
    68,691,863.20x = 102,949,321.20 × 52,656,023.20
  4. Step 4: Simplify right side
    68,691,863.20x = 5,420,901,845,531,452
  5. Step 5: Solve for x
    x = 5,420,901,845,531,452/68,691,863.20
  6. Step 6: Final answer
    x = 78,916,215.01

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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.