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Finding the Fourth Proportional to 54,759.80, 82,139.70 and 49,230.20

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Solution

The fourth proportional to 54,759.80, 82,139.70 and 49,230.20 is: 73,845.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,759.80 : 82,139.70 = 49,230.20 : x
  2. Step 2: Convert to fraction form
    54,759.80/82,139.70 = 49,230.20/x
  3. Step 3: Cross multiply
    54,759.80x = 82,139.70 × 49,230.20
  4. Step 4: Simplify right side
    54,759.80x = 4,043,753,858.94
  5. Step 5: Solve for x
    x = 4,043,753,858.94/54,759.80
  6. Step 6: Final answer
    x = 73,845.30

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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.