Home / 81,414.30-122,120.54-28,811.49

Finding the Fourth Proportional to 81,414.30, 122,120.54 and 28,811.49

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Solution

The fourth proportional to 81,414.30, 122,120.54 and 28,811.49 is: 43,216.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,414.30 : 122,120.54 = 28,811.49 : x
  2. Step 2: Convert to fraction form
    81,414.30/122,120.54 = 28,811.49/x
  3. Step 3: Cross multiply
    81,414.30x = 122,120.54 × 28,811.49
  4. Step 4: Simplify right side
    81,414.30x = 3,518,474,717.00
  5. Step 5: Solve for x
    x = 3,518,474,717.00/81,414.30
  6. Step 6: Final answer
    x = 43,216.91

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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.