Home / 143,649.07-198,231.65-78,236.41

Finding the Fourth Proportional to 143,649.07, 198,231.65 and 78,236.41

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Solution

The fourth proportional to 143,649.07, 198,231.65 and 78,236.41 is: 107,964.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,649.07 : 198,231.65 = 78,236.41 : x
  2. Step 2: Convert to fraction form
    143,649.07/198,231.65 = 78,236.41/x
  3. Step 3: Cross multiply
    143,649.07x = 198,231.65 × 78,236.41
  4. Step 4: Simplify right side
    143,649.07x = 15,508,932,644.38
  5. Step 5: Solve for x
    x = 15,508,932,644.38/143,649.07
  6. Step 6: Final answer
    x = 107,964.03

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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.