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Finding the Fourth Proportional to 111,668.54, 154,103.59 and 60,681.28

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Solution

The fourth proportional to 111,668.54, 154,103.59 and 60,681.28 is: 83,740.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,668.54 : 154,103.59 = 60,681.28 : x
  2. Step 2: Convert to fraction form
    111,668.54/154,103.59 = 60,681.28/x
  3. Step 3: Cross multiply
    111,668.54x = 154,103.59 × 60,681.28
  4. Step 4: Simplify right side
    111,668.54x = 9,351,202,853.25
  5. Step 5: Solve for x
    x = 9,351,202,853.25/111,668.54
  6. Step 6: Final answer
    x = 83,740.71

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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.