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Finding the Fourth Proportional to 203,613.99, 305,522.82 and 91,374.45

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Solution

The fourth proportional to 203,613.99, 305,522.82 and 91,374.45 is: 137,107.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,613.99 : 305,522.82 = 91,374.45 : x
  2. Step 2: Convert to fraction form
    203,613.99/305,522.82 = 91,374.45/x
  3. Step 3: Cross multiply
    203,613.99x = 305,522.82 × 91,374.45
  4. Step 4: Simplify right side
    203,613.99x = 27,916,979,639.95
  5. Step 5: Solve for x
    x = 27,916,979,639.95/203,613.99
  6. Step 6: Final answer
    x = 137,107.37

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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.