Home / 90,056.26-135,137.85-40,139.20

Finding the Fourth Proportional to 90,056.26, 135,137.85 and 40,139.20

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Solution

The fourth proportional to 90,056.26, 135,137.85 and 40,139.20 is: 60,232.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,056.26 : 135,137.85 = 40,139.20 : x
  2. Step 2: Convert to fraction form
    90,056.26/135,137.85 = 40,139.20/x
  3. Step 3: Cross multiply
    90,056.26x = 135,137.85 × 40,139.20
  4. Step 4: Simplify right side
    90,056.26x = 5,424,325,188.72
  5. Step 5: Solve for x
    x = 5,424,325,188.72/90,056.26
  6. Step 6: Final answer
    x = 60,232.63

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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.