Home / 81,908.64-122,755.68-79,848

Finding the Fourth Proportional to 81,908.64, 122,755.68 and 79,848

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Solution

The fourth proportional to 81,908.64, 122,755.68 and 79,848 is: 119,667.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,908.64 : 122,755.68 = 79,848 : x
  2. Step 2: Convert to fraction form
    81,908.64/122,755.68 = 79,848/x
  3. Step 3: Cross multiply
    81,908.64x = 122,755.68 × 79,848
  4. Step 4: Simplify right side
    81,908.64x = 9,801,795,536.64
  5. Step 5: Solve for x
    x = 9,801,795,536.64/81,908.64
  6. Step 6: Final answer
    x = 119,667.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.