Home / 81,391.32-122,061.11-76,078.30

Finding the Fourth Proportional to 81,391.32, 122,061.11 and 76,078.30

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Solution

The fourth proportional to 81,391.32, 122,061.11 and 76,078.30 is: 114,093.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.32 : 122,061.11 = 76,078.30 : x
  2. Step 2: Convert to fraction form
    81,391.32/122,061.11 = 76,078.30/x
  3. Step 3: Cross multiply
    81,391.32x = 122,061.11 × 76,078.30
  4. Step 4: Simplify right side
    81,391.32x = 9,286,201,192.09
  5. Step 5: Solve for x
    x = 9,286,201,192.09/81,391.32
  6. Step 6: Final answer
    x = 114,093.27

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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.