Home / 81,979.70-122,986.82-26,571.38

Finding the Fourth Proportional to 81,979.70, 122,986.82 and 26,571.38

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Solution

The fourth proportional to 81,979.70, 122,986.82 and 26,571.38 is: 39,862.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,979.70 : 122,986.82 = 26,571.38 : x
  2. Step 2: Convert to fraction form
    81,979.70/122,986.82 = 26,571.38/x
  3. Step 3: Cross multiply
    81,979.70x = 122,986.82 × 26,571.38
  4. Step 4: Simplify right side
    81,979.70x = 3,267,928,980.71
  5. Step 5: Solve for x
    x = 3,267,928,980.71/81,979.70
  6. Step 6: Final answer
    x = 39,862.66

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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.