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Finding the Fourth Proportional to 111,949.40, 168,015.90 and 111,074.60

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Solution

The fourth proportional to 111,949.40, 168,015.90 and 111,074.60 is: 166,702.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,949.40 : 168,015.90 = 111,074.60 : x
  2. Step 2: Convert to fraction form
    111,949.40/168,015.90 = 111,074.60/x
  3. Step 3: Cross multiply
    111,949.40x = 168,015.90 × 111,074.60
  4. Step 4: Simplify right side
    111,949.40x = 18,662,298,886.14
  5. Step 5: Solve for x
    x = 18,662,298,886.14/111,949.40
  6. Step 6: Final answer
    x = 166,702.98

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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.