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Finding the Fourth Proportional to 198,995.50, 298,495.55 and 85,127.82

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Solution

The fourth proportional to 198,995.50, 298,495.55 and 85,127.82 is: 127,692.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,995.50 : 298,495.55 = 85,127.82 : x
  2. Step 2: Convert to fraction form
    198,995.50/298,495.55 = 85,127.82/x
  3. Step 3: Cross multiply
    198,995.50x = 298,495.55 × 85,127.82
  4. Step 4: Simplify right side
    198,995.50x = 25,410,275,025.56
  5. Step 5: Solve for x
    x = 25,410,275,025.56/198,995.50
  6. Step 6: Final answer
    x = 127,692.71

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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.