Home / 143,771.29-198,405.69-79,242.86

Finding the Fourth Proportional to 143,771.29, 198,405.69 and 79,242.86

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Solution

The fourth proportional to 143,771.29, 198,405.69 and 79,242.86 is: 109,355.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,771.29 : 198,405.69 = 79,242.86 : x
  2. Step 2: Convert to fraction form
    143,771.29/198,405.69 = 79,242.86/x
  3. Step 3: Cross multiply
    143,771.29x = 198,405.69 × 79,242.86
  4. Step 4: Simplify right side
    143,771.29x = 15,722,234,315.87
  5. Step 5: Solve for x
    x = 15,722,234,315.87/143,771.29
  6. Step 6: Final answer
    x = 109,355.87

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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.