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Finding the Fourth Proportional to 218,942.60, 328,413.90 and 119,064.20

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Solution

The fourth proportional to 218,942.60, 328,413.90 and 119,064.20 is: 178,596.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,942.60 : 328,413.90 = 119,064.20 : x
  2. Step 2: Convert to fraction form
    218,942.60/328,413.90 = 119,064.20/x
  3. Step 3: Cross multiply
    218,942.60x = 328,413.90 × 119,064.20
  4. Step 4: Simplify right side
    218,942.60x = 39,102,338,272.38
  5. Step 5: Solve for x
    x = 39,102,338,272.38/218,942.60
  6. Step 6: Final answer
    x = 178,596.30

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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.