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Finding the Fourth Proportional to 109,353.62, 150,904.30 and 66,912.15

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Solution

The fourth proportional to 109,353.62, 150,904.30 and 66,912.15 is: 92,336.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,353.62 : 150,904.30 = 66,912.15 : x
  2. Step 2: Convert to fraction form
    109,353.62/150,904.30 = 66,912.15/x
  3. Step 3: Cross multiply
    109,353.62x = 150,904.30 × 66,912.15
  4. Step 4: Simplify right side
    109,353.62x = 10,097,331,681.32
  5. Step 5: Solve for x
    x = 10,097,331,681.32/109,353.62
  6. Step 6: Final answer
    x = 92,336.51

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1.5x scale

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.