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Finding the Fourth Proportional to 111,147.75, 153,369.56 and 63,398.25

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Solution

The fourth proportional to 111,147.75, 153,369.56 and 63,398.25 is: 87,481.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,147.75 : 153,369.56 = 63,398.25 : x
  2. Step 2: Convert to fraction form
    111,147.75/153,369.56 = 63,398.25/x
  3. Step 3: Cross multiply
    111,147.75x = 153,369.56 × 63,398.25
  4. Step 4: Simplify right side
    111,147.75x = 9,723,361,390.28
  5. Step 5: Solve for x
    x = 9,723,361,390.28/111,147.75
  6. Step 6: Final answer
    x = 87,481.41

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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.