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Finding the Fourth Proportional to 118,245.20, 177,367.80 and 112,413.20

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Solution

The fourth proportional to 118,245.20, 177,367.80 and 112,413.20 is: 168,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,245.20 : 177,367.80 = 112,413.20 : x
  2. Step 2: Convert to fraction form
    118,245.20/177,367.80 = 112,413.20/x
  3. Step 3: Cross multiply
    118,245.20x = 177,367.80 × 112,413.20
  4. Step 4: Simplify right side
    118,245.20x = 19,938,481,974.96
  5. Step 5: Solve for x
    x = 19,938,481,974.96/118,245.20
  6. Step 6: Final answer
    x = 168,619.80

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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.