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Finding the Fourth Proportional to 159,289.56, 219,819.62 and 86,692.73

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Solution

The fourth proportional to 159,289.56, 219,819.62 and 86,692.73 is: 119,635.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,289.56 : 219,819.62 = 86,692.73 : x
  2. Step 2: Convert to fraction form
    159,289.56/219,819.62 = 86,692.73/x
  3. Step 3: Cross multiply
    159,289.56x = 219,819.62 × 86,692.73
  4. Step 4: Simplify right side
    159,289.56x = 19,056,761,432.80
  5. Step 5: Solve for x
    x = 19,056,761,432.80/159,289.56
  6. Step 6: Final answer
    x = 119,635.97

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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.