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Finding the Fourth Proportional to 268,651.12, 402,942.12 and 91,150.96

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Solution

The fourth proportional to 268,651.12, 402,942.12 and 91,150.96 is: 136,714.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,651.12 : 402,942.12 = 91,150.96 : x
  2. Step 2: Convert to fraction form
    268,651.12/402,942.12 = 91,150.96/x
  3. Step 3: Cross multiply
    268,651.12x = 402,942.12 × 91,150.96
  4. Step 4: Simplify right side
    268,651.12x = 36,728,561,062.44
  5. Step 5: Solve for x
    x = 36,728,561,062.44/268,651.12
  6. Step 6: Final answer
    x = 136,714.71

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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.