Home / 90,785.40-136,231.38-38,190.84

Finding the Fourth Proportional to 90,785.40, 136,231.38 and 38,190.84

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Solution

The fourth proportional to 90,785.40, 136,231.38 and 38,190.84 is: 57,308.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,785.40 : 136,231.38 = 38,190.84 : x
  2. Step 2: Convert to fraction form
    90,785.40/136,231.38 = 38,190.84/x
  3. Step 3: Cross multiply
    90,785.40x = 136,231.38 × 38,190.84
  4. Step 4: Simplify right side
    90,785.40x = 5,202,790,836.56
  5. Step 5: Solve for x
    x = 5,202,790,836.56/90,785.40
  6. Step 6: Final answer
    x = 57,308.67

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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.