Home / 143,679.70-198,270.19-79,136.38

Finding the Fourth Proportional to 143,679.70, 198,270.19 and 79,136.38

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Solution

The fourth proportional to 143,679.70, 198,270.19 and 79,136.38 is: 109,203.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,679.70 : 198,270.19 = 79,136.38 : x
  2. Step 2: Convert to fraction form
    143,679.70/198,270.19 = 79,136.38/x
  3. Step 3: Cross multiply
    143,679.70x = 198,270.19 × 79,136.38
  4. Step 4: Simplify right side
    143,679.70x = 15,690,384,330.00
  5. Step 5: Solve for x
    x = 15,690,384,330.00/143,679.70
  6. Step 6: Final answer
    x = 109,203.90

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1.5x scale

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.