Home / 90,479.92-135,704.76-28,145.56

Finding the Fourth Proportional to 90,479.92, 135,704.76 and 28,145.56

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Solution

The fourth proportional to 90,479.92, 135,704.76 and 28,145.56 is: 42,213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,479.92 : 135,704.76 = 28,145.56 : x
  2. Step 2: Convert to fraction form
    90,479.92/135,704.76 = 28,145.56/x
  3. Step 3: Cross multiply
    90,479.92x = 135,704.76 × 28,145.56
  4. Step 4: Simplify right side
    90,479.92x = 3,819,486,464.87
  5. Step 5: Solve for x
    x = 3,819,486,464.87/90,479.92
  6. Step 6: Final answer
    x = 42,213.64

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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.