Home / 90,729.32-135,993.13-68,470.52

Finding the Fourth Proportional to 90,729.32, 135,993.13 and 68,470.52

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Solution

The fourth proportional to 90,729.32, 135,993.13 and 68,470.52 is: 102,629.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,729.32 : 135,993.13 = 68,470.52 : x
  2. Step 2: Convert to fraction form
    90,729.32/135,993.13 = 68,470.52/x
  3. Step 3: Cross multiply
    90,729.32x = 135,993.13 × 68,470.52
  4. Step 4: Simplify right side
    90,729.32x = 9,311,519,476.39
  5. Step 5: Solve for x
    x = 9,311,519,476.39/90,729.32
  6. Step 6: Final answer
    x = 102,629.67

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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.