Home / 90,377.28-135,570.24-28,039.68

Finding the Fourth Proportional to 90,377.28, 135,570.24 and 28,039.68

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Solution

The fourth proportional to 90,377.28, 135,570.24 and 28,039.68 is: 42,060.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,377.28 : 135,570.24 = 28,039.68 : x
  2. Step 2: Convert to fraction form
    90,377.28/135,570.24 = 28,039.68/x
  3. Step 3: Cross multiply
    90,377.28x = 135,570.24 × 28,039.68
  4. Step 4: Simplify right side
    90,377.28x = 3,801,346,147.12
  5. Step 5: Solve for x
    x = 3,801,346,147.12/90,377.28
  6. Step 6: Final answer
    x = 42,060.86

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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.