Home / 190,469.80-285,826.20-90,742.60

Finding the Fourth Proportional to 190,469.80, 285,826.20 and 90,742.60

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Solution

The fourth proportional to 190,469.80, 285,826.20 and 90,742.60 is: 136,171.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,469.80 : 285,826.20 = 90,742.60 : x
  2. Step 2: Convert to fraction form
    190,469.80/285,826.20 = 90,742.60/x
  3. Step 3: Cross multiply
    190,469.80x = 285,826.20 × 90,742.60
  4. Step 4: Simplify right side
    190,469.80x = 25,936,612,536.12
  5. Step 5: Solve for x
    x = 25,936,612,536.12/190,469.80
  6. Step 6: Final answer
    x = 136,171.78

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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.