Home / 90,039.11-135,143.42-45,697.69

Finding the Fourth Proportional to 90,039.11, 135,143.42 and 45,697.69

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Solution

The fourth proportional to 90,039.11, 135,143.42 and 45,697.69 is: 68,589.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,039.11 : 135,143.42 = 45,697.69 : x
  2. Step 2: Convert to fraction form
    90,039.11/135,143.42 = 45,697.69/x
  3. Step 3: Cross multiply
    90,039.11x = 135,143.42 × 45,697.69
  4. Step 4: Simplify right side
    90,039.11x = 6,175,741,546.35
  5. Step 5: Solve for x
    x = 6,175,741,546.35/90,039.11
  6. Step 6: Final answer
    x = 68,589.54

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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.