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Finding the Fourth Proportional to 111,611.20, 154,025.92 and 63,868.80

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Solution

The fourth proportional to 111,611.20, 154,025.92 and 63,868.80 is: 88,140.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,611.20 : 154,025.92 = 63,868.80 : x
  2. Step 2: Convert to fraction form
    111,611.20/154,025.92 = 63,868.80/x
  3. Step 3: Cross multiply
    111,611.20x = 154,025.92 × 63,868.80
  4. Step 4: Simplify right side
    111,611.20x = 9,837,450,679.30
  5. Step 5: Solve for x
    x = 9,837,450,679.30/111,611.20
  6. Step 6: Final answer
    x = 88,140.35

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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.