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Finding the Fourth Proportional to 139,413.87, 192,392.30 and 75,751.67

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Solution

The fourth proportional to 139,413.87, 192,392.30 and 75,751.67 is: 104,537.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,413.87 : 192,392.30 = 75,751.67 : x
  2. Step 2: Convert to fraction form
    139,413.87/192,392.30 = 75,751.67/x
  3. Step 3: Cross multiply
    139,413.87x = 192,392.30 × 75,751.67
  4. Step 4: Simplify right side
    139,413.87x = 14,574,038,690.50
  5. Step 5: Solve for x
    x = 14,574,038,690.50/139,413.87
  6. Step 6: Final answer
    x = 104,537.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.