Home / 80,120.98-120,209.21-30,215.39

Finding the Fourth Proportional to 80,120.98, 120,209.21 and 30,215.39

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Solution

The fourth proportional to 80,120.98, 120,209.21 and 30,215.39 is: 45,333.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,120.98 : 120,209.21 = 30,215.39 : x
  2. Step 2: Convert to fraction form
    80,120.98/120,209.21 = 30,215.39/x
  3. Step 3: Cross multiply
    80,120.98x = 120,209.21 × 30,215.39
  4. Step 4: Simplify right side
    80,120.98x = 3,632,168,161.74
  5. Step 5: Solve for x
    x = 3,632,168,161.74/80,120.98
  6. Step 6: Final answer
    x = 45,333.55

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1.5x scale

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.