Home / 135,563.90-187,078.20-75,138.44

Finding the Fourth Proportional to 135,563.90, 187,078.20 and 75,138.44

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Solution

The fourth proportional to 135,563.90, 187,078.20 and 75,138.44 is: 103,691.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,563.90 : 187,078.20 = 75,138.44 : x
  2. Step 2: Convert to fraction form
    135,563.90/187,078.20 = 75,138.44/x
  3. Step 3: Cross multiply
    135,563.90x = 187,078.20 × 75,138.44
  4. Step 4: Simplify right side
    135,563.90x = 14,056,764,106.01
  5. Step 5: Solve for x
    x = 14,056,764,106.01/135,563.90
  6. Step 6: Final answer
    x = 103,691.06

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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.