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Finding the Fourth Proportional to 111,662.74, 154,086.60 and 63,915.40

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Solution

The fourth proportional to 111,662.74, 154,086.60 and 63,915.40 is: 88,198.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,662.74 : 154,086.60 = 63,915.40 : x
  2. Step 2: Convert to fraction form
    111,662.74/154,086.60 = 63,915.40/x
  3. Step 3: Cross multiply
    111,662.74x = 154,086.60 × 63,915.40
  4. Step 4: Simplify right side
    111,662.74x = 9,848,506,673.64
  5. Step 5: Solve for x
    x = 9,848,506,673.64/111,662.74
  6. Step 6: Final answer
    x = 88,198.68

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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.