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Finding the Fourth Proportional to 111,208.80, 166,813.20 and 48,879.30

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Solution

The fourth proportional to 111,208.80, 166,813.20 and 48,879.30 is: 73,318.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,208.80 : 166,813.20 = 48,879.30 : x
  2. Step 2: Convert to fraction form
    111,208.80/166,813.20 = 48,879.30/x
  3. Step 3: Cross multiply
    111,208.80x = 166,813.20 × 48,879.30
  4. Step 4: Simplify right side
    111,208.80x = 8,153,712,446.76
  5. Step 5: Solve for x
    x = 8,153,712,446.76/111,208.80
  6. Step 6: Final answer
    x = 73,318.95

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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.