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Finding the Fourth Proportional to 111,296.65, 153,642.57 and 63,540.77

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Solution

The fourth proportional to 111,296.65, 153,642.57 and 63,540.77 is: 87,716.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,296.65 : 153,642.57 = 63,540.77 : x
  2. Step 2: Convert to fraction form
    111,296.65/153,642.57 = 63,540.77/x
  3. Step 3: Cross multiply
    111,296.65x = 153,642.57 × 63,540.77
  4. Step 4: Simplify right side
    111,296.65x = 9,762,567,202.58
  5. Step 5: Solve for x
    x = 9,762,567,202.58/111,296.65
  6. Step 6: Final answer
    x = 87,716.63

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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.