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Finding the Fourth Proportional to 263,913.99, 395,781.67 and 86,376.97

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Solution

The fourth proportional to 263,913.99, 395,781.67 and 86,376.97 is: 129,536.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,913.99 : 395,781.67 = 86,376.97 : x
  2. Step 2: Convert to fraction form
    263,913.99/395,781.67 = 86,376.97/x
  3. Step 3: Cross multiply
    263,913.99x = 395,781.67 × 86,376.97
  4. Step 4: Simplify right side
    263,913.99x = 34,186,421,436.14
  5. Step 5: Solve for x
    x = 34,186,421,436.14/263,913.99
  6. Step 6: Final answer
    x = 129,536.22

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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.