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Finding the Fourth Proportional to 82,120.80, 122,950.80 and 79,816.80

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Solution

The fourth proportional to 82,120.80, 122,950.80 and 79,816.80 is: 119,501.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,120.80 : 122,950.80 = 79,816.80 : x
  2. Step 2: Convert to fraction form
    82,120.80/122,950.80 = 79,816.80/x
  3. Step 3: Cross multiply
    82,120.80x = 122,950.80 × 79,816.80
  4. Step 4: Simplify right side
    82,120.80x = 9,813,539,413.44
  5. Step 5: Solve for x
    x = 9,813,539,413.44/82,120.80
  6. Step 6: Final answer
    x = 119,501.26

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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.