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Finding the Fourth Proportional to 159,879.87, 220,634.70 and 87,282.87

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Solution

The fourth proportional to 159,879.87, 220,634.70 and 87,282.87 is: 120,450.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,879.87 : 220,634.70 = 87,282.87 : x
  2. Step 2: Convert to fraction form
    159,879.87/220,634.70 = 87,282.87/x
  3. Step 3: Cross multiply
    159,879.87x = 220,634.70 × 87,282.87
  4. Step 4: Simplify right side
    159,879.87x = 19,257,629,952.76
  5. Step 5: Solve for x
    x = 19,257,629,952.76/159,879.87
  6. Step 6: Final answer
    x = 120,450.62

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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.