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Finding the Fourth Proportional to 106,905.60, 160,396.80 and 103,065.60

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Solution

The fourth proportional to 106,905.60, 160,396.80 and 103,065.60 is: 154,635.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,905.60 : 160,396.80 = 103,065.60 : x
  2. Step 2: Convert to fraction form
    106,905.60/160,396.80 = 103,065.60/x
  3. Step 3: Cross multiply
    106,905.60x = 160,396.80 × 103,065.60
  4. Step 4: Simplify right side
    106,905.60x = 16,531,392,430.08
  5. Step 5: Solve for x
    x = 16,531,392,430.08/106,905.60
  6. Step 6: Final answer
    x = 154,635.42

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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.