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Finding the Fourth Proportional to 118,663.56, 178,065.36 and 43,836.66

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Solution

The fourth proportional to 118,663.56, 178,065.36 and 43,836.66 is: 65,780.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,663.56 : 178,065.36 = 43,836.66 : x
  2. Step 2: Convert to fraction form
    118,663.56/178,065.36 = 43,836.66/x
  3. Step 3: Cross multiply
    118,663.56x = 178,065.36 × 43,836.66
  4. Step 4: Simplify right side
    118,663.56x = 7,805,790,644.10
  5. Step 5: Solve for x
    x = 7,805,790,644.10/118,663.56
  6. Step 6: Final answer
    x = 65,780.86

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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.