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Finding the Fourth Proportional to 143,644.41, 198,227.93 and 79,978.41

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Solution

The fourth proportional to 143,644.41, 198,227.93 and 79,978.41 is: 110,369.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,644.41 : 198,227.93 = 79,978.41 : x
  2. Step 2: Convert to fraction form
    143,644.41/198,227.93 = 79,978.41/x
  3. Step 3: Cross multiply
    143,644.41x = 198,227.93 × 79,978.41
  4. Step 4: Simplify right side
    143,644.41x = 15,853,954,259.10
  5. Step 5: Solve for x
    x = 15,853,954,259.10/143,644.41
  6. Step 6: Final answer
    x = 110,369.45

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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.