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Finding the Fourth Proportional to 117,632.78, 162,352.59 and 85,906.70

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Solution

The fourth proportional to 117,632.78, 162,352.59 and 85,906.70 is: 118,565.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,632.78 : 162,352.59 = 85,906.70 : x
  2. Step 2: Convert to fraction form
    117,632.78/162,352.59 = 85,906.70/x
  3. Step 3: Cross multiply
    117,632.78x = 162,352.59 × 85,906.70
  4. Step 4: Simplify right side
    117,632.78x = 13,947,175,243.35
  5. Step 5: Solve for x
    x = 13,947,175,243.35/117,632.78
  6. Step 6: Final answer
    x = 118,565.38

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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.