Home / 126,220.40-189,100.20-102,719.60

Finding the Fourth Proportional to 126,220.40, 189,100.20 and 102,719.60

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Solution

The fourth proportional to 126,220.40, 189,100.20 and 102,719.60 is: 153,891.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,220.40 : 189,100.20 = 102,719.60 : x
  2. Step 2: Convert to fraction form
    126,220.40/189,100.20 = 102,719.60/x
  3. Step 3: Cross multiply
    126,220.40x = 189,100.20 × 102,719.60
  4. Step 4: Simplify right side
    126,220.40x = 19,424,296,903.92
  5. Step 5: Solve for x
    x = 19,424,296,903.92/126,220.40
  6. Step 6: Final answer
    x = 153,891.90

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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.