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Finding the Fourth Proportional to 111,391.44, 153,705.98 and 63,647.88

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Solution

The fourth proportional to 111,391.44, 153,705.98 and 63,647.88 is: 87,825.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,391.44 : 153,705.98 = 63,647.88 : x
  2. Step 2: Convert to fraction form
    111,391.44/153,705.98 = 63,647.88/x
  3. Step 3: Cross multiply
    111,391.44x = 153,705.98 × 63,647.88
  4. Step 4: Simplify right side
    111,391.44x = 9,783,059,770.32
  5. Step 5: Solve for x
    x = 9,783,059,770.32/111,391.44
  6. Step 6: Final answer
    x = 87,825.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.