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Finding the Fourth Proportional to 54,520,978.20, 81,781,467.30 and 49,738,009.20

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Solution

The fourth proportional to 54,520,978.20, 81,781,467.30 and 49,738,009.20 is: 74,607,013.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,520,978.20 : 81,781,467.30 = 49,738,009.20 : x
  2. Step 2: Convert to fraction form
    54,520,978.20/81,781,467.30 = 49,738,009.20/x
  3. Step 3: Cross multiply
    54,520,978.20x = 81,781,467.30 × 49,738,009.20
  4. Step 4: Simplify right side
    54,520,978.20x = 4,067,647,372,956,899.50
  5. Step 5: Solve for x
    x = 4,067,647,372,956,899.50/54,520,978.20
  6. Step 6: Final answer
    x = 74,607,013.80

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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.