Home / 143,579.28-198,135-79,915.44

Finding the Fourth Proportional to 143,579.28, 198,135 and 79,915.44

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Solution

The fourth proportional to 143,579.28, 198,135 and 79,915.44 is: 110,280.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,579.28 : 198,135 = 79,915.44 : x
  2. Step 2: Convert to fraction form
    143,579.28/198,135 = 79,915.44/x
  3. Step 3: Cross multiply
    143,579.28x = 198,135 × 79,915.44
  4. Step 4: Simplify right side
    143,579.28x = 15,834,045,704.40
  5. Step 5: Solve for x
    x = 15,834,045,704.40/143,579.28
  6. Step 6: Final answer
    x = 110,280.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.