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Finding the Fourth Proportional to 118,516.40, 177,515.40 and 92,013.20

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Solution

The fourth proportional to 118,516.40, 177,515.40 and 92,013.20 is: 137,818.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,516.40 : 177,515.40 = 92,013.20 : x
  2. Step 2: Convert to fraction form
    118,516.40/177,515.40 = 92,013.20/x
  3. Step 3: Cross multiply
    118,516.40x = 177,515.40 × 92,013.20
  4. Step 4: Simplify right side
    118,516.40x = 16,333,760,003.28
  5. Step 5: Solve for x
    x = 16,333,760,003.28/118,516.40
  6. Step 6: Final answer
    x = 137,818.56

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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.