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Finding the Fourth Proportional to 131,008.62, 180,786.69 and 74,413.74

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Solution

The fourth proportional to 131,008.62, 180,786.69 and 74,413.74 is: 102,688.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,008.62 : 180,786.69 = 74,413.74 : x
  2. Step 2: Convert to fraction form
    131,008.62/180,786.69 = 74,413.74/x
  3. Step 3: Cross multiply
    131,008.62x = 180,786.69 × 74,413.74
  4. Step 4: Simplify right side
    131,008.62x = 13,453,013,745.12
  5. Step 5: Solve for x
    x = 13,453,013,745.12/131,008.62
  6. Step 6: Final answer
    x = 102,688.00

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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.