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Finding the Fourth Proportional to 111,408.66, 153,744.20 and 63,661.89

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Solution

The fourth proportional to 111,408.66, 153,744.20 and 63,661.89 is: 87,853.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,408.66 : 153,744.20 = 63,661.89 : x
  2. Step 2: Convert to fraction form
    111,408.66/153,744.20 = 63,661.89/x
  3. Step 3: Cross multiply
    111,408.66x = 153,744.20 × 63,661.89
  4. Step 4: Simplify right side
    111,408.66x = 9,787,646,507.69
  5. Step 5: Solve for x
    x = 9,787,646,507.69/111,408.66
  6. Step 6: Final answer
    x = 87,853.55

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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.