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Finding the Fourth Proportional to 111,793.17, 154,220.37 and 66,439.05

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Solution

The fourth proportional to 111,793.17, 154,220.37 and 66,439.05 is: 91,653.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,793.17 : 154,220.37 = 66,439.05 : x
  2. Step 2: Convert to fraction form
    111,793.17/154,220.37 = 66,439.05/x
  3. Step 3: Cross multiply
    111,793.17x = 154,220.37 × 66,439.05
  4. Step 4: Simplify right side
    111,793.17x = 10,246,254,873.45
  5. Step 5: Solve for x
    x = 10,246,254,873.45/111,793.17
  6. Step 6: Final answer
    x = 91,653.68

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Double scale
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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.