Home / 82,731.42-124,072.46-30,128.60

Finding the Fourth Proportional to 82,731.42, 124,072.46 and 30,128.60

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Solution

The fourth proportional to 82,731.42, 124,072.46 and 30,128.60 is: 45,183.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,731.42 : 124,072.46 = 30,128.60 : x
  2. Step 2: Convert to fraction form
    82,731.42/124,072.46 = 30,128.60/x
  3. Step 3: Cross multiply
    82,731.42x = 124,072.46 × 30,128.60
  4. Step 4: Simplify right side
    82,731.42x = 3,738,129,518.36
  5. Step 5: Solve for x
    x = 3,738,129,518.36/82,731.42
  6. Step 6: Final answer
    x = 45,183.92

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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.