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Finding the Fourth Proportional to 159,238.53, 219,743.69 and 87,611.85

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Solution

The fourth proportional to 159,238.53, 219,743.69 and 87,611.85 is: 120,901.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,238.53 : 219,743.69 = 87,611.85 : x
  2. Step 2: Convert to fraction form
    159,238.53/219,743.69 = 87,611.85/x
  3. Step 3: Cross multiply
    159,238.53x = 219,743.69 × 87,611.85
  4. Step 4: Simplify right side
    159,238.53x = 19,252,150,768.67
  5. Step 5: Solve for x
    x = 19,252,150,768.67/159,238.53
  6. Step 6: Final answer
    x = 120,901.33

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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.