Home / 205,850.80-308,776.20-81,175.60

Finding the Fourth Proportional to 205,850.80, 308,776.20 and 81,175.60

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Solution

The fourth proportional to 205,850.80, 308,776.20 and 81,175.60 is: 121,763.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,850.80 : 308,776.20 = 81,175.60 : x
  2. Step 2: Convert to fraction form
    205,850.80/308,776.20 = 81,175.60/x
  3. Step 3: Cross multiply
    205,850.80x = 308,776.20 × 81,175.60
  4. Step 4: Simplify right side
    205,850.80x = 25,065,093,300.72
  5. Step 5: Solve for x
    x = 25,065,093,300.72/205,850.80
  6. Step 6: Final answer
    x = 121,763.40

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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.