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Finding the Fourth Proportional to 121,413.60, 182,120.40 and 68,050.80

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Solution

The fourth proportional to 121,413.60, 182,120.40 and 68,050.80 is: 102,076.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,413.60 : 182,120.40 = 68,050.80 : x
  2. Step 2: Convert to fraction form
    121,413.60/182,120.40 = 68,050.80/x
  3. Step 3: Cross multiply
    121,413.60x = 182,120.40 × 68,050.80
  4. Step 4: Simplify right side
    121,413.60x = 12,393,438,916.32
  5. Step 5: Solve for x
    x = 12,393,438,916.32/121,413.60
  6. Step 6: Final answer
    x = 102,076.20

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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.