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Finding the Fourth Proportional to 131,996.40, 198,124.20 and 65,511.60

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Solution

The fourth proportional to 131,996.40, 198,124.20 and 65,511.60 is: 98,331.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,996.40 : 198,124.20 = 65,511.60 : x
  2. Step 2: Convert to fraction form
    131,996.40/198,124.20 = 65,511.60/x
  3. Step 3: Cross multiply
    131,996.40x = 198,124.20 × 65,511.60
  4. Step 4: Simplify right side
    131,996.40x = 12,979,433,340.72
  5. Step 5: Solve for x
    x = 12,979,433,340.72/131,996.40
  6. Step 6: Final answer
    x = 98,331.72

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1.5x scale

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.