Home / 213,136.20-319,704.30-178,921.80

Finding the Fourth Proportional to 213,136.20, 319,704.30 and 178,921.80

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Solution

The fourth proportional to 213,136.20, 319,704.30 and 178,921.80 is: 268,382.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,136.20 : 319,704.30 = 178,921.80 : x
  2. Step 2: Convert to fraction form
    213,136.20/319,704.30 = 178,921.80/x
  3. Step 3: Cross multiply
    213,136.20x = 319,704.30 × 178,921.80
  4. Step 4: Simplify right side
    213,136.20x = 57,202,068,823.74
  5. Step 5: Solve for x
    x = 57,202,068,823.74/213,136.20
  6. Step 6: Final answer
    x = 268,382.70

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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.