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Finding the Fourth Proportional to 110,779.80, 166,169.70 and 71,413.80

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Solution

The fourth proportional to 110,779.80, 166,169.70 and 71,413.80 is: 107,120.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,779.80 : 166,169.70 = 71,413.80 : x
  2. Step 2: Convert to fraction form
    110,779.80/166,169.70 = 71,413.80/x
  3. Step 3: Cross multiply
    110,779.80x = 166,169.70 × 71,413.80
  4. Step 4: Simplify right side
    110,779.80x = 11,866,809,721.86
  5. Step 5: Solve for x
    x = 11,866,809,721.86/110,779.80
  6. Step 6: Final answer
    x = 107,120.70

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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.