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Finding the Fourth Proportional to 343,911.96, 515,890.73 and 91,188.93

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Solution

The fourth proportional to 343,911.96, 515,890.73 and 91,188.93 is: 136,789.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,911.96 : 515,890.73 = 91,188.93 : x
  2. Step 2: Convert to fraction form
    343,911.96/515,890.73 = 91,188.93/x
  3. Step 3: Cross multiply
    343,911.96x = 515,890.73 × 91,188.93
  4. Step 4: Simplify right side
    343,911.96x = 47,043,523,665.62
  5. Step 5: Solve for x
    x = 47,043,523,665.62/343,911.96
  6. Step 6: Final answer
    x = 136,789.44

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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.