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Finding the Fourth Proportional to 111,013.80, 153,187.20 and 65,694.12

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Solution

The fourth proportional to 111,013.80, 153,187.20 and 65,694.12 is: 90,650.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,013.80 : 153,187.20 = 65,694.12 : x
  2. Step 2: Convert to fraction form
    111,013.80/153,187.20 = 65,694.12/x
  3. Step 3: Cross multiply
    111,013.80x = 153,187.20 × 65,694.12
  4. Step 4: Simplify right side
    111,013.80x = 10,063,498,299.26
  5. Step 5: Solve for x
    x = 10,063,498,299.26/111,013.80
  6. Step 6: Final answer
    x = 90,650.88

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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.