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Finding the Fourth Proportional to 86,514.78, 129,789.48 and 36,594.66

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Solution

The fourth proportional to 86,514.78, 129,789.48 and 36,594.66 is: 54,899.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,514.78 : 129,789.48 = 36,594.66 : x
  2. Step 2: Convert to fraction form
    86,514.78/129,789.48 = 36,594.66/x
  3. Step 3: Cross multiply
    86,514.78x = 129,789.48 × 36,594.66
  4. Step 4: Simplify right side
    86,514.78x = 4,749,601,892.18
  5. Step 5: Solve for x
    x = 4,749,601,892.18/86,514.78
  6. Step 6: Final answer
    x = 54,899.31

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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.