Home / 126,906.40-190,129.20-103,405.60

Finding the Fourth Proportional to 126,906.40, 190,129.20 and 103,405.60

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Solution

The fourth proportional to 126,906.40, 190,129.20 and 103,405.60 is: 154,920.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,906.40 : 190,129.20 = 103,405.60 : x
  2. Step 2: Convert to fraction form
    126,906.40/190,129.20 = 103,405.60/x
  3. Step 3: Cross multiply
    126,906.40x = 190,129.20 × 103,405.60
  4. Step 4: Simplify right side
    126,906.40x = 19,660,424,003.52
  5. Step 5: Solve for x
    x = 19,660,424,003.52/126,906.40
  6. Step 6: Final answer
    x = 154,920.67

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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.