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Finding the Fourth Proportional to 203,490.80, 305,025.60 and 91,224.80

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Solution

The fourth proportional to 203,490.80, 305,025.60 and 91,224.80 is: 136,742.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,490.80 : 305,025.60 = 91,224.80 : x
  2. Step 2: Convert to fraction form
    203,490.80/305,025.60 = 91,224.80/x
  3. Step 3: Cross multiply
    203,490.80x = 305,025.60 × 91,224.80
  4. Step 4: Simplify right side
    203,490.80x = 27,825,899,354.88
  5. Step 5: Solve for x
    x = 27,825,899,354.88/203,490.80
  6. Step 6: Final answer
    x = 136,742.79

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1.5x scale

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.