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Finding the Fourth Proportional to 198,770, 298,091.40 and 65,620.40

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Solution

The fourth proportional to 198,770, 298,091.40 and 65,620.40 is: 98,409.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,770 : 298,091.40 = 65,620.40 : x
  2. Step 2: Convert to fraction form
    198,770/298,091.40 = 65,620.40/x
  3. Step 3: Cross multiply
    198,770x = 298,091.40 × 65,620.40
  4. Step 4: Simplify right side
    198,770x = 19,560,876,904.56
  5. Step 5: Solve for x
    x = 19,560,876,904.56/198,770
  6. Step 6: Final answer
    x = 98,409.60

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