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Finding the Fourth Proportional to 54,517.60, 81,661.20 and 48,680.80

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Solution

The fourth proportional to 54,517.60, 81,661.20 and 48,680.80 is: 72,918.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,517.60 : 81,661.20 = 48,680.80 : x
  2. Step 2: Convert to fraction form
    54,517.60/81,661.20 = 48,680.80/x
  3. Step 3: Cross multiply
    54,517.60x = 81,661.20 × 48,680.80
  4. Step 4: Simplify right side
    54,517.60x = 3,975,332,544.96
  5. Step 5: Solve for x
    x = 3,975,332,544.96/54,517.60
  6. Step 6: Final answer
    x = 72,918.33

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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.