Home / 198,942.89-298,411.61-86,620.70

Finding the Fourth Proportional to 198,942.89, 298,411.61 and 86,620.70

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Solution

The fourth proportional to 198,942.89, 298,411.61 and 86,620.70 is: 129,929.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,942.89 : 298,411.61 = 86,620.70 : x
  2. Step 2: Convert to fraction form
    198,942.89/298,411.61 = 86,620.70/x
  3. Step 3: Cross multiply
    198,942.89x = 298,411.61 × 86,620.70
  4. Step 4: Simplify right side
    198,942.89x = 25,848,622,859.25
  5. Step 5: Solve for x
    x = 25,848,622,859.25/198,942.89
  6. Step 6: Final answer
    x = 129,929.86

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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.