Home / 90,118.85-135,198.75-47,976.72

Finding the Fourth Proportional to 90,118.85, 135,198.75 and 47,976.72

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Solution

The fourth proportional to 90,118.85, 135,198.75 and 47,976.72 is: 71,975.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,118.85 : 135,198.75 = 47,976.72 : x
  2. Step 2: Convert to fraction form
    90,118.85/135,198.75 = 47,976.72/x
  3. Step 3: Cross multiply
    90,118.85x = 135,198.75 × 47,976.72
  4. Step 4: Simplify right side
    90,118.85x = 6,486,392,246.02
  5. Step 5: Solve for x
    x = 6,486,392,246.02/90,118.85
  6. Step 6: Final answer
    x = 71,975.98

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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.