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Finding the Fourth Proportional to 228,413.78, 342,620.67 and 70,643.60

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Solution

The fourth proportional to 228,413.78, 342,620.67 and 70,643.60 is: 105,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,413.78 : 342,620.67 = 70,643.60 : x
  2. Step 2: Convert to fraction form
    228,413.78/342,620.67 = 70,643.60/x
  3. Step 3: Cross multiply
    228,413.78x = 342,620.67 × 70,643.60
  4. Step 4: Simplify right side
    228,413.78x = 24,203,957,563.21
  5. Step 5: Solve for x
    x = 24,203,957,563.21/228,413.78
  6. Step 6: Final answer
    x = 105,965.40

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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.