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Finding the Fourth Proportional to 221,608.80, 332,413.20 and 128,005.20

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Solution

The fourth proportional to 221,608.80, 332,413.20 and 128,005.20 is: 192,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,608.80 : 332,413.20 = 128,005.20 : x
  2. Step 2: Convert to fraction form
    221,608.80/332,413.20 = 128,005.20/x
  3. Step 3: Cross multiply
    221,608.80x = 332,413.20 × 128,005.20
  4. Step 4: Simplify right side
    221,608.80x = 42,550,618,148.64
  5. Step 5: Solve for x
    x = 42,550,618,148.64/221,608.80
  6. Step 6: Final answer
    x = 192,007.80

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1.5x scale

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.