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Finding the Fourth Proportional to 111,772.06, 154,237.70 and 66,447.70

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Solution

The fourth proportional to 111,772.06, 154,237.70 and 66,447.70 is: 91,693.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,772.06 : 154,237.70 = 66,447.70 : x
  2. Step 2: Convert to fraction form
    111,772.06/154,237.70 = 66,447.70/x
  3. Step 3: Cross multiply
    111,772.06x = 154,237.70 × 66,447.70
  4. Step 4: Simplify right side
    111,772.06x = 10,248,740,418.29
  5. Step 5: Solve for x
    x = 10,248,740,418.29/111,772.06
  6. Step 6: Final answer
    x = 91,693.22

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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.