Home / 57,986.20-86,979.30-30,280.60

Finding the Fourth Proportional to 57,986.20, 86,979.30 and 30,280.60

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Solution

The fourth proportional to 57,986.20, 86,979.30 and 30,280.60 is: 45,420.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,986.20 : 86,979.30 = 30,280.60 : x
  2. Step 2: Convert to fraction form
    57,986.20/86,979.30 = 30,280.60/x
  3. Step 3: Cross multiply
    57,986.20x = 86,979.30 × 30,280.60
  4. Step 4: Simplify right side
    57,986.20x = 2,633,785,391.58
  5. Step 5: Solve for x
    x = 2,633,785,391.58/57,986.20
  6. Step 6: Final answer
    x = 45,420.90

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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.