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Finding the Fourth Proportional to 198,556.45, 297,770.64 and 65,405.05

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Solution

The fourth proportional to 198,556.45, 297,770.64 and 65,405.05 is: 98,086.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,556.45 : 297,770.64 = 65,405.05 : x
  2. Step 2: Convert to fraction form
    198,556.45/297,770.64 = 65,405.05/x
  3. Step 3: Cross multiply
    198,556.45x = 297,770.64 × 65,405.05
  4. Step 4: Simplify right side
    198,556.45x = 19,475,703,597.73
  5. Step 5: Solve for x
    x = 19,475,703,597.73/198,556.45
  6. Step 6: Final answer
    x = 98,086.48

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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.