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Finding the Fourth Proportional to 291,198.77, 436,781.73 and 129,046.12

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Solution

The fourth proportional to 291,198.77, 436,781.73 and 129,046.12 is: 193,561.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,198.77 : 436,781.73 = 129,046.12 : x
  2. Step 2: Convert to fraction form
    291,198.77/436,781.73 = 129,046.12/x
  3. Step 3: Cross multiply
    291,198.77x = 436,781.73 × 129,046.12
  4. Step 4: Simplify right side
    291,198.77x = 56,364,984,714.25
  5. Step 5: Solve for x
    x = 56,364,984,714.25/291,198.77
  6. Step 6: Final answer
    x = 193,561.89

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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.