Home / 100,635.43-138,880.20-55,315.03

Finding the Fourth Proportional to 100,635.43, 138,880.20 and 55,315.03

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Solution

The fourth proportional to 100,635.43, 138,880.20 and 55,315.03 is: 76,336.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,635.43 : 138,880.20 = 55,315.03 : x
  2. Step 2: Convert to fraction form
    100,635.43/138,880.20 = 55,315.03/x
  3. Step 3: Cross multiply
    100,635.43x = 138,880.20 × 55,315.03
  4. Step 4: Simplify right side
    100,635.43x = 7,682,162,429.41
  5. Step 5: Solve for x
    x = 7,682,162,429.41/100,635.43
  6. Step 6: Final answer
    x = 76,336.56

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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.