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Finding the Fourth Proportional to 268,958.94, 403,321.76 and 91,418.28

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Solution

The fourth proportional to 268,958.94, 403,321.76 and 91,418.28 is: 137,087.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,958.94 : 403,321.76 = 91,418.28 : x
  2. Step 2: Convert to fraction form
    268,958.94/403,321.76 = 91,418.28/x
  3. Step 3: Cross multiply
    268,958.94x = 403,321.76 × 91,418.28
  4. Step 4: Simplify right side
    268,958.94x = 36,870,981,585.77
  5. Step 5: Solve for x
    x = 36,870,981,585.77/268,958.94
  6. Step 6: Final answer
    x = 137,087.77

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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.