Home / 80,830.20-121,223.70-28,234.20

Finding the Fourth Proportional to 80,830.20, 121,223.70 and 28,234.20

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Solution

The fourth proportional to 80,830.20, 121,223.70 and 28,234.20 is: 42,343.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,830.20 : 121,223.70 = 28,234.20 : x
  2. Step 2: Convert to fraction form
    80,830.20/121,223.70 = 28,234.20/x
  3. Step 3: Cross multiply
    80,830.20x = 121,223.70 × 28,234.20
  4. Step 4: Simplify right side
    80,830.20x = 3,422,654,190.54
  5. Step 5: Solve for x
    x = 3,422,654,190.54/80,830.20
  6. Step 6: Final answer
    x = 42,343.76

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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.