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Finding the Fourth Proportional to 343,843.92, 515,741.54 and 91,118.82

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Solution

The fourth proportional to 343,843.92, 515,741.54 and 91,118.82 is: 136,671.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,843.92 : 515,741.54 = 91,118.82 : x
  2. Step 2: Convert to fraction form
    343,843.92/515,741.54 = 91,118.82/x
  3. Step 3: Cross multiply
    343,843.92x = 515,741.54 × 91,118.82
  4. Step 4: Simplify right side
    343,843.92x = 46,993,760,549.78
  5. Step 5: Solve for x
    x = 46,993,760,549.78/343,843.92
  6. Step 6: Final answer
    x = 136,671.78

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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.