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Finding the Fourth Proportional to 266,413.36, 399,817.20 and 126,172.32

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Solution

The fourth proportional to 266,413.36, 399,817.20 and 126,172.32 is: 189,351.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,413.36 : 399,817.20 = 126,172.32 : x
  2. Step 2: Convert to fraction form
    266,413.36/399,817.20 = 126,172.32/x
  3. Step 3: Cross multiply
    266,413.36x = 399,817.20 × 126,172.32
  4. Step 4: Simplify right side
    266,413.36x = 50,445,863,699.90
  5. Step 5: Solve for x
    x = 50,445,863,699.90/266,413.36
  6. Step 6: Final answer
    x = 189,351.85

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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.