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Finding the Fourth Proportional to 54,555.36, 81,728.80 and 45,727.20

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Solution

The fourth proportional to 54,555.36, 81,728.80 and 45,727.20 is: 68,503.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,555.36 : 81,728.80 = 45,727.20 : x
  2. Step 2: Convert to fraction form
    54,555.36/81,728.80 = 45,727.20/x
  3. Step 3: Cross multiply
    54,555.36x = 81,728.80 × 45,727.20
  4. Step 4: Simplify right side
    54,555.36x = 3,737,229,183.36
  5. Step 5: Solve for x
    x = 3,737,229,183.36/54,555.36
  6. Step 6: Final answer
    x = 68,503.43

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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.