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Finding the Fourth Proportional to 139,413.48, 192,390.15 and 75,751.53

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Solution

The fourth proportional to 139,413.48, 192,390.15 and 75,751.53 is: 104,536.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,413.48 : 192,390.15 = 75,751.53 : x
  2. Step 2: Convert to fraction form
    139,413.48/192,390.15 = 75,751.53/x
  3. Step 3: Cross multiply
    139,413.48x = 192,390.15 × 75,751.53
  4. Step 4: Simplify right side
    139,413.48x = 14,573,848,219.43
  5. Step 5: Solve for x
    x = 14,573,848,219.43/139,413.48
  6. Step 6: Final answer
    x = 104,536.87

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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.