Home / 80,063.12-120,115.53-30,143.63

Finding the Fourth Proportional to 80,063.12, 120,115.53 and 30,143.63

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Solution

The fourth proportional to 80,063.12, 120,115.53 and 30,143.63 is: 45,223.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,063.12 : 120,115.53 = 30,143.63 : x
  2. Step 2: Convert to fraction form
    80,063.12/120,115.53 = 30,143.63/x
  3. Step 3: Cross multiply
    80,063.12x = 120,115.53 × 30,143.63
  4. Step 4: Simplify right side
    80,063.12x = 3,620,717,493.00
  5. Step 5: Solve for x
    x = 3,620,717,493.00/80,063.12
  6. Step 6: Final answer
    x = 45,223.29

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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.