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Finding the Fourth Proportional to 86,481.84, 119,379.42 and 74,334.36

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Solution

The fourth proportional to 86,481.84, 119,379.42 and 74,334.36 is: 102,611.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,481.84 : 119,379.42 = 74,334.36 : x
  2. Step 2: Convert to fraction form
    86,481.84/119,379.42 = 74,334.36/x
  3. Step 3: Cross multiply
    86,481.84x = 119,379.42 × 74,334.36
  4. Step 4: Simplify right side
    86,481.84x = 8,873,992,782.87
  5. Step 5: Solve for x
    x = 8,873,992,782.87/86,481.84
  6. Step 6: Final answer
    x = 102,611.05

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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.