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Finding the Fourth Proportional to 111,418.39, 153,755.28 and 63,019.47

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Solution

The fourth proportional to 111,418.39, 153,755.28 and 63,019.47 is: 86,965.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,418.39 : 153,755.28 = 63,019.47 : x
  2. Step 2: Convert to fraction form
    111,418.39/153,755.28 = 63,019.47/x
  3. Step 3: Cross multiply
    111,418.39x = 153,755.28 × 63,019.47
  4. Step 4: Simplify right side
    111,418.39x = 9,689,576,255.30
  5. Step 5: Solve for x
    x = 9,689,576,255.30/111,418.39
  6. Step 6: Final answer
    x = 86,965.68

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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.