Home / 205,515.20-308,272.80-57,771.20

Finding the Fourth Proportional to 205,515.20, 308,272.80 and 57,771.20

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Solution

The fourth proportional to 205,515.20, 308,272.80 and 57,771.20 is: 86,656.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,515.20 : 308,272.80 = 57,771.20 : x
  2. Step 2: Convert to fraction form
    205,515.20/308,272.80 = 57,771.20/x
  3. Step 3: Cross multiply
    205,515.20x = 308,272.80 × 57,771.20
  4. Step 4: Simplify right side
    205,515.20x = 17,809,289,583.36
  5. Step 5: Solve for x
    x = 17,809,289,583.36/205,515.20
  6. Step 6: Final answer
    x = 86,656.80

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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.