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Finding the Fourth Proportional to 111,693.92, 154,113.16 and 66,386.96

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Solution

The fourth proportional to 111,693.92, 154,113.16 and 66,386.96 is: 91,599.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,693.92 : 154,113.16 = 66,386.96 : x
  2. Step 2: Convert to fraction form
    111,693.92/154,113.16 = 66,386.96/x
  3. Step 3: Cross multiply
    111,693.92x = 154,113.16 × 66,386.96
  4. Step 4: Simplify right side
    111,693.92x = 10,231,104,188.39
  5. Step 5: Solve for x
    x = 10,231,104,188.39/111,693.92
  6. Step 6: Final answer
    x = 91,599.47

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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.