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Finding the Fourth Proportional to 121,286.60, 181,929.90 and 113,413.40

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Solution

The fourth proportional to 121,286.60, 181,929.90 and 113,413.40 is: 170,120.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,286.60 : 181,929.90 = 113,413.40 : x
  2. Step 2: Convert to fraction form
    121,286.60/181,929.90 = 113,413.40/x
  3. Step 3: Cross multiply
    121,286.60x = 181,929.90 × 113,413.40
  4. Step 4: Simplify right side
    121,286.60x = 20,633,288,520.66
  5. Step 5: Solve for x
    x = 20,633,288,520.66/121,286.60
  6. Step 6: Final answer
    x = 170,120.10

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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.