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Finding the Fourth Proportional to 103,621.20, 155,431.80 and 33,550.80

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Solution

The fourth proportional to 103,621.20, 155,431.80 and 33,550.80 is: 50,326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,621.20 : 155,431.80 = 33,550.80 : x
  2. Step 2: Convert to fraction form
    103,621.20/155,431.80 = 33,550.80/x
  3. Step 3: Cross multiply
    103,621.20x = 155,431.80 × 33,550.80
  4. Step 4: Simplify right side
    103,621.20x = 5,214,861,235.44
  5. Step 5: Solve for x
    x = 5,214,861,235.44/103,621.20
  6. Step 6: Final answer
    x = 50,326.20

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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.