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Finding the Fourth Proportional to 54,268.80, 81,403.20 and 45,520.80

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Solution

The fourth proportional to 54,268.80, 81,403.20 and 45,520.80 is: 68,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,268.80 : 81,403.20 = 45,520.80 : x
  2. Step 2: Convert to fraction form
    54,268.80/81,403.20 = 45,520.80/x
  3. Step 3: Cross multiply
    54,268.80x = 81,403.20 × 45,520.80
  4. Step 4: Simplify right side
    54,268.80x = 3,705,538,786.56
  5. Step 5: Solve for x
    x = 3,705,538,786.56/54,268.80
  6. Step 6: Final answer
    x = 68,281.20

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1.5x scale

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.