Home / 137,836.80-190,215-80,515.44

Finding the Fourth Proportional to 137,836.80, 190,215 and 80,515.44

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Solution

The fourth proportional to 137,836.80, 190,215 and 80,515.44 is: 111,111.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,836.80 : 190,215 = 80,515.44 : x
  2. Step 2: Convert to fraction form
    137,836.80/190,215 = 80,515.44/x
  3. Step 3: Cross multiply
    137,836.80x = 190,215 × 80,515.44
  4. Step 4: Simplify right side
    137,836.80x = 15,315,244,419.60
  5. Step 5: Solve for x
    x = 15,315,244,419.60/137,836.80
  6. Step 6: Final answer
    x = 111,111.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.