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Finding the Fourth Proportional to 198,563.11, 297,780.64 and 65,411.66

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Solution

The fourth proportional to 198,563.11, 297,780.64 and 65,411.66 is: 98,096.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,563.11 : 297,780.64 = 65,411.66 : x
  2. Step 2: Convert to fraction form
    198,563.11/297,780.64 = 65,411.66/x
  3. Step 3: Cross multiply
    198,563.11x = 297,780.64 × 65,411.66
  4. Step 4: Simplify right side
    198,563.11x = 19,478,326,559.18
  5. Step 5: Solve for x
    x = 19,478,326,559.18/198,563.11
  6. Step 6: Final answer
    x = 98,096.40

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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.