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Finding the Fourth Proportional to 143,311.87, 197,768.94 and 79,648.39

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Solution

The fourth proportional to 143,311.87, 197,768.94 and 79,648.39 is: 109,913.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,311.87 : 197,768.94 = 79,648.39 : x
  2. Step 2: Convert to fraction form
    143,311.87/197,768.94 = 79,648.39/x
  3. Step 3: Cross multiply
    143,311.87x = 197,768.94 × 79,648.39
  4. Step 4: Simplify right side
    143,311.87x = 15,751,977,663.01
  5. Step 5: Solve for x
    x = 15,751,977,663.01/143,311.87
  6. Step 6: Final answer
    x = 109,913.98

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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.