Home / 129,680.36-178,956.42-73,090.60

Finding the Fourth Proportional to 129,680.36, 178,956.42 and 73,090.60

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Solution

The fourth proportional to 129,680.36, 178,956.42 and 73,090.60 is: 100,863.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,680.36 : 178,956.42 = 73,090.60 : x
  2. Step 2: Convert to fraction form
    129,680.36/178,956.42 = 73,090.60/x
  3. Step 3: Cross multiply
    129,680.36x = 178,956.42 × 73,090.60
  4. Step 4: Simplify right side
    129,680.36x = 13,080,032,111.65
  5. Step 5: Solve for x
    x = 13,080,032,111.65/129,680.36
  6. Step 6: Final answer
    x = 100,863.63

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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.