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Finding the Fourth Proportional to 54,327.20, 81,490.80 and 47,760.80

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Solution

The fourth proportional to 54,327.20, 81,490.80 and 47,760.80 is: 71,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,327.20 : 81,490.80 = 47,760.80 : x
  2. Step 2: Convert to fraction form
    54,327.20/81,490.80 = 47,760.80/x
  3. Step 3: Cross multiply
    54,327.20x = 81,490.80 × 47,760.80
  4. Step 4: Simplify right side
    54,327.20x = 3,892,065,800.64
  5. Step 5: Solve for x
    x = 3,892,065,800.64/54,327.20
  6. Step 6: Final answer
    x = 71,641.20

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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.