Home / 138,571.26-191,257.11-90,735.90

Finding the Fourth Proportional to 138,571.26, 191,257.11 and 90,735.90

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Solution

The fourth proportional to 138,571.26, 191,257.11 and 90,735.90 is: 125,234.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,571.26 : 191,257.11 = 90,735.90 : x
  2. Step 2: Convert to fraction form
    138,571.26/191,257.11 = 90,735.90/x
  3. Step 3: Cross multiply
    138,571.26x = 191,257.11 × 90,735.90
  4. Step 4: Simplify right side
    138,571.26x = 17,353,886,007.25
  5. Step 5: Solve for x
    x = 17,353,886,007.25/138,571.26
  6. Step 6: Final answer
    x = 125,234.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.