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Finding the Fourth Proportional to 111,688.56, 154,122.12 and 66,364.56

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Solution

The fourth proportional to 111,688.56, 154,122.12 and 66,364.56 is: 91,578.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,688.56 : 154,122.12 = 66,364.56 : x
  2. Step 2: Convert to fraction form
    111,688.56/154,122.12 = 66,364.56/x
  3. Step 3: Cross multiply
    111,688.56x = 154,122.12 × 66,364.56
  4. Step 4: Simplify right side
    111,688.56x = 10,228,246,680.07
  5. Step 5: Solve for x
    x = 10,228,246,680.07/111,688.56
  6. Step 6: Final answer
    x = 91,578.28

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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.