Home / 129,721.20-178,994.66-73,121.64

Finding the Fourth Proportional to 129,721.20, 178,994.66 and 73,121.64

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Solution

The fourth proportional to 129,721.20, 178,994.66 and 73,121.64 is: 100,896.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,721.20 : 178,994.66 = 73,121.64 : x
  2. Step 2: Convert to fraction form
    129,721.20/178,994.66 = 73,121.64/x
  3. Step 3: Cross multiply
    129,721.20x = 178,994.66 × 73,121.64
  4. Step 4: Simplify right side
    129,721.20x = 13,088,383,090.44
  5. Step 5: Solve for x
    x = 13,088,383,090.44/129,721.20
  6. Step 6: Final answer
    x = 100,896.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.