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Finding the Fourth Proportional to 263,999.10, 395,901.45 and 86,511.90

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Solution

The fourth proportional to 263,999.10, 395,901.45 and 86,511.90 is: 129,736.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,999.10 : 395,901.45 = 86,511.90 : x
  2. Step 2: Convert to fraction form
    263,999.10/395,901.45 = 86,511.90/x
  3. Step 3: Cross multiply
    263,999.10x = 395,901.45 × 86,511.90
  4. Step 4: Simplify right side
    263,999.10x = 34,250,186,652.26
  5. Step 5: Solve for x
    x = 34,250,186,652.26/263,999.10
  6. Step 6: Final answer
    x = 129,736.00

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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.