Home / 87,515.10-131,240.25-68,831.46

Finding the Fourth Proportional to 87,515.10, 131,240.25 and 68,831.46

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Solution

The fourth proportional to 87,515.10, 131,240.25 and 68,831.46 is: 103,221.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,515.10 : 131,240.25 = 68,831.46 : x
  2. Step 2: Convert to fraction form
    87,515.10/131,240.25 = 68,831.46/x
  3. Step 3: Cross multiply
    87,515.10x = 131,240.25 × 68,831.46
  4. Step 4: Simplify right side
    87,515.10x = 9,033,458,018.27
  5. Step 5: Solve for x
    x = 9,033,458,018.27/87,515.10
  6. Step 6: Final answer
    x = 103,221.71

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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.