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Finding the Fourth Proportional to 111,245.43, 153,395.73 and 85,695.06

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Solution

The fourth proportional to 111,245.43, 153,395.73 and 85,695.06 is: 118,164.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,245.43 : 153,395.73 = 85,695.06 : x
  2. Step 2: Convert to fraction form
    111,245.43/153,395.73 = 85,695.06/x
  3. Step 3: Cross multiply
    111,245.43x = 153,395.73 × 85,695.06
  4. Step 4: Simplify right side
    111,245.43x = 13,145,256,286.09
  5. Step 5: Solve for x
    x = 13,145,256,286.09/111,245.43
  6. Step 6: Final answer
    x = 118,164.46

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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.