Home / 143,969.50-198,678.09-80,311.33

Finding the Fourth Proportional to 143,969.50, 198,678.09 and 80,311.33

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Solution

The fourth proportional to 143,969.50, 198,678.09 and 80,311.33 is: 110,829.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,969.50 : 198,678.09 = 80,311.33 : x
  2. Step 2: Convert to fraction form
    143,969.50/198,678.09 = 80,311.33/x
  3. Step 3: Cross multiply
    143,969.50x = 198,678.09 × 80,311.33
  4. Step 4: Simplify right side
    143,969.50x = 15,956,101,649.76
  5. Step 5: Solve for x
    x = 15,956,101,649.76/143,969.50
  6. Step 6: Final answer
    x = 110,829.74

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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.