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Finding the Fourth Proportional to 167,977.60, 251,620.80 and 84,918.40

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Solution

The fourth proportional to 167,977.60, 251,620.80 and 84,918.40 is: 127,202.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,977.60 : 251,620.80 = 84,918.40 : x
  2. Step 2: Convert to fraction form
    167,977.60/251,620.80 = 84,918.40/x
  3. Step 3: Cross multiply
    167,977.60x = 251,620.80 × 84,918.40
  4. Step 4: Simplify right side
    167,977.60x = 21,367,235,742.72
  5. Step 5: Solve for x
    x = 21,367,235,742.72/167,977.60
  6. Step 6: Final answer
    x = 127,202.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.