Home / 81,822.31-122,735-25,661.19

Finding the Fourth Proportional to 81,822.31, 122,735 and 25,661.19

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Solution

The fourth proportional to 81,822.31, 122,735 and 25,661.19 is: 38,492.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,822.31 : 122,735 = 25,661.19 : x
  2. Step 2: Convert to fraction form
    81,822.31/122,735 = 25,661.19/x
  3. Step 3: Cross multiply
    81,822.31x = 122,735 × 25,661.19
  4. Step 4: Simplify right side
    81,822.31x = 3,149,526,154.65
  5. Step 5: Solve for x
    x = 3,149,526,154.65/81,822.31
  6. Step 6: Final answer
    x = 38,492.27

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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.