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Finding the Fourth Proportional to 279,413.90, 419,116.72 and 69,051.84

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Solution

The fourth proportional to 279,413.90, 419,116.72 and 69,051.84 is: 103,576.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,413.90 : 419,116.72 = 69,051.84 : x
  2. Step 2: Convert to fraction form
    279,413.90/419,116.72 = 69,051.84/x
  3. Step 3: Cross multiply
    279,413.90x = 419,116.72 × 69,051.84
  4. Step 4: Simplify right side
    279,413.90x = 28,940,780,690.76
  5. Step 5: Solve for x
    x = 28,940,780,690.76/279,413.90
  6. Step 6: Final answer
    x = 103,576.74

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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.