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Finding the Fourth Proportional to 111,853.59, 154,360.80 and 60,869.09

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Solution

The fourth proportional to 111,853.59, 154,360.80 and 60,869.09 is: 84,000.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,853.59 : 154,360.80 = 60,869.09 : x
  2. Step 2: Convert to fraction form
    111,853.59/154,360.80 = 60,869.09/x
  3. Step 3: Cross multiply
    111,853.59x = 154,360.80 × 60,869.09
  4. Step 4: Simplify right side
    111,853.59x = 9,395,800,655.87
  5. Step 5: Solve for x
    x = 9,395,800,655.87/111,853.59
  6. Step 6: Final answer
    x = 84,000.89

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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.