Home / 84,409.09-117,017.26-79,914.80

Finding the Fourth Proportional to 84,409.09, 117,017.26 and 79,914.80

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Solution

The fourth proportional to 84,409.09, 117,017.26 and 79,914.80 is: 110,786.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,409.09 : 117,017.26 = 79,914.80 : x
  2. Step 2: Convert to fraction form
    84,409.09/117,017.26 = 79,914.80/x
  3. Step 3: Cross multiply
    84,409.09x = 117,017.26 × 79,914.80
  4. Step 4: Simplify right side
    84,409.09x = 9,351,411,022.20
  5. Step 5: Solve for x
    x = 9,351,411,022.20/84,409.09
  6. Step 6: Final answer
    x = 110,786.78

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.