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Finding the Fourth Proportional to 203,891.56, 305,937.57 and 91,651.07

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Solution

The fourth proportional to 203,891.56, 305,937.57 and 91,651.07 is: 137,521.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,891.56 : 305,937.57 = 91,651.07 : x
  2. Step 2: Convert to fraction form
    203,891.56/305,937.57 = 91,651.07/x
  3. Step 3: Cross multiply
    203,891.56x = 305,937.57 × 91,651.07
  4. Step 4: Simplify right side
    203,891.56x = 28,039,505,643.70
  5. Step 5: Solve for x
    x = 28,039,505,643.70/203,891.56
  6. Step 6: Final answer
    x = 137,521.66

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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.