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Finding the Fourth Proportional to 90,369.01, 135,498.78 and 40,439.80

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Solution

The fourth proportional to 90,369.01, 135,498.78 and 40,439.80 is: 60,635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,369.01 : 135,498.78 = 40,439.80 : x
  2. Step 2: Convert to fraction form
    90,369.01/135,498.78 = 40,439.80/x
  3. Step 3: Cross multiply
    90,369.01x = 135,498.78 × 40,439.80
  4. Step 4: Simplify right side
    90,369.01x = 5,479,543,563.44
  5. Step 5: Solve for x
    x = 5,479,543,563.44/90,369.01
  6. Step 6: Final answer
    x = 60,635.21

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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.