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Finding the Fourth Proportional to 157,608.80, 236,413.20 and 78,735.20

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Solution

The fourth proportional to 157,608.80, 236,413.20 and 78,735.20 is: 118,102.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,608.80 : 236,413.20 = 78,735.20 : x
  2. Step 2: Convert to fraction form
    157,608.80/236,413.20 = 78,735.20/x
  3. Step 3: Cross multiply
    157,608.80x = 236,413.20 × 78,735.20
  4. Step 4: Simplify right side
    157,608.80x = 18,614,040,584.64
  5. Step 5: Solve for x
    x = 18,614,040,584.64/157,608.80
  6. Step 6: Final answer
    x = 118,102.80

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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.