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Finding the Fourth Proportional to 111,206.80, 166,583.40 and 68,957.20

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Solution

The fourth proportional to 111,206.80, 166,583.40 and 68,957.20 is: 103,295.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,206.80 : 166,583.40 = 68,957.20 : x
  2. Step 2: Convert to fraction form
    111,206.80/166,583.40 = 68,957.20/x
  3. Step 3: Cross multiply
    111,206.80x = 166,583.40 × 68,957.20
  4. Step 4: Simplify right side
    111,206.80x = 11,487,124,830.48
  5. Step 5: Solve for x
    x = 11,487,124,830.48/111,206.80
  6. Step 6: Final answer
    x = 103,295.17

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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.