Home / 90,738.50-125,213.20-50,450.78

Finding the Fourth Proportional to 90,738.50, 125,213.20 and 50,450.78

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Solution

The fourth proportional to 90,738.50, 125,213.20 and 50,450.78 is: 69,618.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,738.50 : 125,213.20 = 50,450.78 : x
  2. Step 2: Convert to fraction form
    90,738.50/125,213.20 = 50,450.78/x
  3. Step 3: Cross multiply
    90,738.50x = 125,213.20 × 50,450.78
  4. Step 4: Simplify right side
    90,738.50x = 6,317,103,606.30
  5. Step 5: Solve for x
    x = 6,317,103,606.30/90,738.50
  6. Step 6: Final answer
    x = 69,618.78

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1.5x scale

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.