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Finding the Fourth Proportional to 143,021.34, 197,369.44 and 79,369.38

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Solution

The fourth proportional to 143,021.34, 197,369.44 and 79,369.38 is: 109,529.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,021.34 : 197,369.44 = 79,369.38 : x
  2. Step 2: Convert to fraction form
    143,021.34/197,369.44 = 79,369.38/x
  3. Step 3: Cross multiply
    143,021.34x = 197,369.44 × 79,369.38
  4. Step 4: Simplify right side
    143,021.34x = 15,665,090,083.75
  5. Step 5: Solve for x
    x = 15,665,090,083.75/143,021.34
  6. Step 6: Final answer
    x = 109,529.74

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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.