Home / 90,917.92-125,481.68-56,939.28

Finding the Fourth Proportional to 90,917.92, 125,481.68 and 56,939.28

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Solution

The fourth proportional to 90,917.92, 125,481.68 and 56,939.28 is: 78,585.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,917.92 : 125,481.68 = 56,939.28 : x
  2. Step 2: Convert to fraction form
    90,917.92/125,481.68 = 56,939.28/x
  3. Step 3: Cross multiply
    90,917.92x = 125,481.68 × 56,939.28
  4. Step 4: Simplify right side
    90,917.92x = 7,144,836,512.39
  5. Step 5: Solve for x
    x = 7,144,836,512.39/90,917.92
  6. Step 6: Final answer
    x = 78,585.57

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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.