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Finding the Fourth Proportional to 159,231.87, 219,735.45 and 87,611.94

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Solution

The fourth proportional to 159,231.87, 219,735.45 and 87,611.94 is: 120,901.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,231.87 : 219,735.45 = 87,611.94 : x
  2. Step 2: Convert to fraction form
    159,231.87/219,735.45 = 87,611.94/x
  3. Step 3: Cross multiply
    159,231.87x = 219,735.45 × 87,611.94
  4. Step 4: Simplify right side
    159,231.87x = 19,251,449,061.27
  5. Step 5: Solve for x
    x = 19,251,449,061.27/159,231.87
  6. Step 6: Final answer
    x = 120,901.98

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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.