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Finding the Fourth Proportional to 139,429.95, 192,413.51 and 79,004.67

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Solution

The fourth proportional to 139,429.95, 192,413.51 and 79,004.67 is: 109,026.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,429.95 : 192,413.51 = 79,004.67 : x
  2. Step 2: Convert to fraction form
    139,429.95/192,413.51 = 79,004.67/x
  3. Step 3: Cross multiply
    139,429.95x = 192,413.51 × 79,004.67
  4. Step 4: Simplify right side
    139,429.95x = 15,201,565,861.09
  5. Step 5: Solve for x
    x = 15,201,565,861.09/139,429.95
  6. Step 6: Final answer
    x = 109,026.55

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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.