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Finding the Fourth Proportional to 203,596.45, 305,496.53 and 91,356.91

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Solution

The fourth proportional to 203,596.45, 305,496.53 and 91,356.91 is: 137,081.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,596.45 : 305,496.53 = 91,356.91 : x
  2. Step 2: Convert to fraction form
    203,596.45/305,496.53 = 91,356.91/x
  3. Step 3: Cross multiply
    203,596.45x = 305,496.53 × 91,356.91
  4. Step 4: Simplify right side
    203,596.45x = 27,909,218,996.52
  5. Step 5: Solve for x
    x = 27,909,218,996.52/203,596.45
  6. Step 6: Final answer
    x = 137,081.07

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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.