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Finding the Fourth Proportional to 54,121.20, 81,181.80 and 48,418.80

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Solution

The fourth proportional to 54,121.20, 81,181.80 and 48,418.80 is: 72,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,121.20 : 81,181.80 = 48,418.80 : x
  2. Step 2: Convert to fraction form
    54,121.20/81,181.80 = 48,418.80/x
  3. Step 3: Cross multiply
    54,121.20x = 81,181.80 × 48,418.80
  4. Step 4: Simplify right side
    54,121.20x = 3,930,725,337.84
  5. Step 5: Solve for x
    x = 3,930,725,337.84/54,121.20
  6. Step 6: Final answer
    x = 72,628.20

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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.