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Finding the Fourth Proportional to 218,413.55, 327,619.95 and 68,666.91

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Solution

The fourth proportional to 218,413.55, 327,619.95 and 68,666.91 is: 103,000.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,413.55 : 327,619.95 = 68,666.91 : x
  2. Step 2: Convert to fraction form
    218,413.55/327,619.95 = 68,666.91/x
  3. Step 3: Cross multiply
    218,413.55x = 327,619.95 × 68,666.91
  4. Step 4: Simplify right side
    218,413.55x = 22,496,649,620.85
  5. Step 5: Solve for x
    x = 22,496,649,620.85/218,413.55
  6. Step 6: Final answer
    x = 103,000.25

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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.