Home / 80,045.22-120,129.81-30,170.69

Finding the Fourth Proportional to 80,045.22, 120,129.81 and 30,170.69

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Solution

The fourth proportional to 80,045.22, 120,129.81 and 30,170.69 is: 45,279.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,045.22 : 120,129.81 = 30,170.69 : x
  2. Step 2: Convert to fraction form
    80,045.22/120,129.81 = 30,170.69/x
  3. Step 3: Cross multiply
    80,045.22x = 120,129.81 × 30,170.69
  4. Step 4: Simplify right side
    80,045.22x = 3,624,398,656.62
  5. Step 5: Solve for x
    x = 3,624,398,656.62/80,045.22
  6. Step 6: Final answer
    x = 45,279.39

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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.