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Finding the Fourth Proportional to 111,668.60, 154,103.28 and 60,681.72

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Solution

The fourth proportional to 111,668.60, 154,103.28 and 60,681.72 is: 83,741.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,668.60 : 154,103.28 = 60,681.72 : x
  2. Step 2: Convert to fraction form
    111,668.60/154,103.28 = 60,681.72/x
  3. Step 3: Cross multiply
    111,668.60x = 154,103.28 × 60,681.72
  4. Step 4: Simplify right side
    111,668.60x = 9,351,252,088.04
  5. Step 5: Solve for x
    x = 9,351,252,088.04/111,668.60
  6. Step 6: Final answer
    x = 83,741.11

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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.