Home / 80,100.75-120,159.35-30,222.82

Finding the Fourth Proportional to 80,100.75, 120,159.35 and 30,222.82

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Solution

The fourth proportional to 80,100.75, 120,159.35 and 30,222.82 is: 45,337.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,100.75 : 120,159.35 = 30,222.82 : x
  2. Step 2: Convert to fraction form
    80,100.75/120,159.35 = 30,222.82/x
  3. Step 3: Cross multiply
    80,100.75x = 120,159.35 × 30,222.82
  4. Step 4: Simplify right side
    80,100.75x = 3,631,554,518.79
  5. Step 5: Solve for x
    x = 3,631,554,518.79/80,100.75
  6. Step 6: Final answer
    x = 45,337.34

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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.