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Finding the Fourth Proportional to 111,708.54, 154,161.54 and 65,759.90

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Solution

The fourth proportional to 111,708.54, 154,161.54 and 65,759.90 is: 90,750.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,708.54 : 154,161.54 = 65,759.90 : x
  2. Step 2: Convert to fraction form
    111,708.54/154,161.54 = 65,759.90/x
  3. Step 3: Cross multiply
    111,708.54x = 154,161.54 × 65,759.90
  4. Step 4: Simplify right side
    111,708.54x = 10,137,646,683.44
  5. Step 5: Solve for x
    x = 10,137,646,683.44/111,708.54
  6. Step 6: Final answer
    x = 90,750.87

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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.