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Finding the Fourth Proportional to 70,398.55, 105,532.21 and 35,297.20

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Solution

The fourth proportional to 70,398.55, 105,532.21 and 35,297.20 is: 52,912.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,398.55 : 105,532.21 = 35,297.20 : x
  2. Step 2: Convert to fraction form
    70,398.55/105,532.21 = 35,297.20/x
  3. Step 3: Cross multiply
    70,398.55x = 105,532.21 × 35,297.20
  4. Step 4: Simplify right side
    70,398.55x = 3,724,991,522.81
  5. Step 5: Solve for x
    x = 3,724,991,522.81/70,398.55
  6. Step 6: Final answer
    x = 52,912.90

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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.