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Finding the Fourth Proportional to 159,200.90, 219,699.06 and 91,216.51

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Solution

The fourth proportional to 159,200.90, 219,699.06 and 91,216.51 is: 125,879.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,200.90 : 219,699.06 = 91,216.51 : x
  2. Step 2: Convert to fraction form
    159,200.90/219,699.06 = 91,216.51/x
  3. Step 3: Cross multiply
    159,200.90x = 219,699.06 × 91,216.51
  4. Step 4: Simplify right side
    159,200.90x = 20,040,180,404.99
  5. Step 5: Solve for x
    x = 20,040,180,404.99/159,200.90
  6. Step 6: Final answer
    x = 125,879.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.