Home / 90,944.20-136,440.60-81,151.30

Finding the Fourth Proportional to 90,944.20, 136,440.60 and 81,151.30

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Solution

The fourth proportional to 90,944.20, 136,440.60 and 81,151.30 is: 121,748.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,944.20 : 136,440.60 = 81,151.30 : x
  2. Step 2: Convert to fraction form
    90,944.20/136,440.60 = 81,151.30/x
  3. Step 3: Cross multiply
    90,944.20x = 136,440.60 × 81,151.30
  4. Step 4: Simplify right side
    90,944.20x = 11,072,332,062.78
  5. Step 5: Solve for x
    x = 11,072,332,062.78/90,944.20
  6. Step 6: Final answer
    x = 121,748.63

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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.