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Finding the Fourth Proportional to 131,879.20, 181,994 and 71,449.96

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Solution

The fourth proportional to 131,879.20, 181,994 and 71,449.96 is: 98,601.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,879.20 : 181,994 = 71,449.96 : x
  2. Step 2: Convert to fraction form
    131,879.20/181,994 = 71,449.96/x
  3. Step 3: Cross multiply
    131,879.20x = 181,994 × 71,449.96
  4. Step 4: Simplify right side
    131,879.20x = 13,003,464,020.24
  5. Step 5: Solve for x
    x = 13,003,464,020.24/131,879.20
  6. Step 6: Final answer
    x = 98,601.33

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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.