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Finding the Fourth Proportional to 143,765.73, 198,388.61 and 79,234.77

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Solution

The fourth proportional to 143,765.73, 198,388.61 and 79,234.77 is: 109,339.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,765.73 : 198,388.61 = 79,234.77 : x
  2. Step 2: Convert to fraction form
    143,765.73/198,388.61 = 79,234.77/x
  3. Step 3: Cross multiply
    143,765.73x = 198,388.61 × 79,234.77
  4. Step 4: Simplify right side
    143,765.73x = 15,719,275,482.54
  5. Step 5: Solve for x
    x = 15,719,275,482.54/143,765.73
  6. Step 6: Final answer
    x = 109,339.52

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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.