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Finding the Fourth Proportional to 111,711.77, 154,145.05 and 66,372.97

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Solution

The fourth proportional to 111,711.77, 154,145.05 and 66,372.97 is: 91,584.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,711.77 : 154,145.05 = 66,372.97 : x
  2. Step 2: Convert to fraction form
    111,711.77/154,145.05 = 66,372.97/x
  3. Step 3: Cross multiply
    111,711.77x = 154,145.05 × 66,372.97
  4. Step 4: Simplify right side
    111,711.77x = 10,231,064,779.30
  5. Step 5: Solve for x
    x = 10,231,064,779.30/111,711.77
  6. Step 6: Final answer
    x = 91,584.48

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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.