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Finding the Fourth Proportional to 54,403.20, 81,496.80 and 47,908.80

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Solution

The fourth proportional to 54,403.20, 81,496.80 and 47,908.80 is: 71,768.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,403.20 : 81,496.80 = 47,908.80 : x
  2. Step 2: Convert to fraction form
    54,403.20/81,496.80 = 47,908.80/x
  3. Step 3: Cross multiply
    54,403.20x = 81,496.80 × 47,908.80
  4. Step 4: Simplify right side
    54,403.20x = 3,904,413,891.84
  5. Step 5: Solve for x
    x = 3,904,413,891.84/54,403.20
  6. Step 6: Final answer
    x = 71,768.09

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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.