Home / 126,286.40-189,199.20-102,785.60

Finding the Fourth Proportional to 126,286.40, 189,199.20 and 102,785.60

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Solution

The fourth proportional to 126,286.40, 189,199.20 and 102,785.60 is: 153,990.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,286.40 : 189,199.20 = 102,785.60 : x
  2. Step 2: Convert to fraction form
    126,286.40/189,199.20 = 102,785.60/x
  3. Step 3: Cross multiply
    126,286.40x = 189,199.20 × 102,785.60
  4. Step 4: Simplify right side
    126,286.40x = 19,446,953,291.52
  5. Step 5: Solve for x
    x = 19,446,953,291.52/126,286.40
  6. Step 6: Final answer
    x = 153,990.88

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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.