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Finding the Fourth Proportional to 93,608.20, 140,120.70 and 90,692.20

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Solution

The fourth proportional to 93,608.20, 140,120.70 and 90,692.20 is: 135,755.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,608.20 : 140,120.70 = 90,692.20 : x
  2. Step 2: Convert to fraction form
    93,608.20/140,120.70 = 90,692.20/x
  3. Step 3: Cross multiply
    93,608.20x = 140,120.70 × 90,692.20
  4. Step 4: Simplify right side
    93,608.20x = 12,707,854,548.54
  5. Step 5: Solve for x
    x = 12,707,854,548.54/93,608.20
  6. Step 6: Final answer
    x = 135,755.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.