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Finding the Fourth Proportional to 143,311.62, 197,768.61 and 79,648.05

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Solution

The fourth proportional to 143,311.62, 197,768.61 and 79,648.05 is: 109,913.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,311.62 : 197,768.61 = 79,648.05 : x
  2. Step 2: Convert to fraction form
    143,311.62/197,768.61 = 79,648.05/x
  3. Step 3: Cross multiply
    143,311.62x = 197,768.61 × 79,648.05
  4. Step 4: Simplify right side
    143,311.62x = 15,751,884,137.71
  5. Step 5: Solve for x
    x = 15,751,884,137.71/143,311.62
  6. Step 6: Final answer
    x = 109,913.52

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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.