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Finding the Fourth Proportional to 90,409.58, 124,769.16 and 50,120.78

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Solution

The fourth proportional to 90,409.58, 124,769.16 and 50,120.78 is: 69,168.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,409.58 : 124,769.16 = 50,120.78 : x
  2. Step 2: Convert to fraction form
    90,409.58/124,769.16 = 50,120.78/x
  3. Step 3: Cross multiply
    90,409.58x = 124,769.16 × 50,120.78
  4. Step 4: Simplify right side
    90,409.58x = 6,253,526,995.30
  5. Step 5: Solve for x
    x = 6,253,526,995.30/90,409.58
  6. Step 6: Final answer
    x = 69,168.86

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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.