Home / 82,183.28-122,680.40-72,218.78

Finding the Fourth Proportional to 82,183.28, 122,680.40 and 72,218.78

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Solution

The fourth proportional to 82,183.28, 122,680.40 and 72,218.78 is: 107,805.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,183.28 : 122,680.40 = 72,218.78 : x
  2. Step 2: Convert to fraction form
    82,183.28/122,680.40 = 72,218.78/x
  3. Step 3: Cross multiply
    82,183.28x = 122,680.40 × 72,218.78
  4. Step 4: Simplify right side
    82,183.28x = 8,859,828,817.91
  5. Step 5: Solve for x
    x = 8,859,828,817.91/82,183.28
  6. Step 6: Final answer
    x = 107,805.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.