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Finding the Fourth Proportional to 54,698.88, 81,990.72 and 28,375.68

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Solution

The fourth proportional to 54,698.88, 81,990.72 and 28,375.68 is: 42,533.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,698.88 : 81,990.72 = 28,375.68 : x
  2. Step 2: Convert to fraction form
    54,698.88/81,990.72 = 28,375.68/x
  3. Step 3: Cross multiply
    54,698.88x = 81,990.72 × 28,375.68
  4. Step 4: Simplify right side
    54,698.88x = 2,326,542,433.69
  5. Step 5: Solve for x
    x = 2,326,542,433.69/54,698.88
  6. Step 6: Final answer
    x = 42,533.64

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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.