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Finding the Fourth Proportional to 86,239.86, 129,351.86 and 23,057.72

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Solution

The fourth proportional to 86,239.86, 129,351.86 and 23,057.72 is: 34,584.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,239.86 : 129,351.86 = 23,057.72 : x
  2. Step 2: Convert to fraction form
    86,239.86/129,351.86 = 23,057.72/x
  3. Step 3: Cross multiply
    86,239.86x = 129,351.86 × 23,057.72
  4. Step 4: Simplify right side
    86,239.86x = 2,982,558,207.31
  5. Step 5: Solve for x
    x = 2,982,558,207.31/86,239.86
  6. Step 6: Final answer
    x = 34,584.45

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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.