Home / 126,890.40-190,105.20-103,389.60

Finding the Fourth Proportional to 126,890.40, 190,105.20 and 103,389.60

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Solution

The fourth proportional to 126,890.40, 190,105.20 and 103,389.60 is: 154,896.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,890.40 : 190,105.20 = 103,389.60 : x
  2. Step 2: Convert to fraction form
    126,890.40/190,105.20 = 103,389.60/x
  3. Step 3: Cross multiply
    126,890.40x = 190,105.20 × 103,389.60
  4. Step 4: Simplify right side
    126,890.40x = 19,654,900,585.92
  5. Step 5: Solve for x
    x = 19,654,900,585.92/126,890.40
  6. Step 6: Final answer
    x = 154,896.67

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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.