Home / 143,650.53-198,237.61-79,120.20

Finding the Fourth Proportional to 143,650.53, 198,237.61 and 79,120.20

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Solution

The fourth proportional to 143,650.53, 198,237.61 and 79,120.20 is: 109,185.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,650.53 : 198,237.61 = 79,120.20 : x
  2. Step 2: Convert to fraction form
    143,650.53/198,237.61 = 79,120.20/x
  3. Step 3: Cross multiply
    143,650.53x = 198,237.61 × 79,120.20
  4. Step 4: Simplify right side
    143,650.53x = 15,684,599,747.96
  5. Step 5: Solve for x
    x = 15,684,599,747.96/143,650.53
  6. Step 6: Final answer
    x = 109,185.81

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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.