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Finding the Fourth Proportional to 118,616.40, 177,665.40 and 92,113.20

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Solution

The fourth proportional to 118,616.40, 177,665.40 and 92,113.20 is: 137,968.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,616.40 : 177,665.40 = 92,113.20 : x
  2. Step 2: Convert to fraction form
    118,616.40/177,665.40 = 92,113.20/x
  3. Step 3: Cross multiply
    118,616.40x = 177,665.40 × 92,113.20
  4. Step 4: Simplify right side
    118,616.40x = 16,365,328,523.28
  5. Step 5: Solve for x
    x = 16,365,328,523.28/118,616.40
  6. Step 6: Final answer
    x = 137,968.51

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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.