Home / 231,795.21-319,873.16-128,429.03

Finding the Fourth Proportional to 231,795.21, 319,873.16 and 128,429.03

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Solution

The fourth proportional to 231,795.21, 319,873.16 and 128,429.03 is: 177,229.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,795.21 : 319,873.16 = 128,429.03 : x
  2. Step 2: Convert to fraction form
    231,795.21/319,873.16 = 128,429.03/x
  3. Step 3: Cross multiply
    231,795.21x = 319,873.16 × 128,429.03
  4. Step 4: Simplify right side
    231,795.21x = 41,080,998,220.01
  5. Step 5: Solve for x
    x = 41,080,998,220.01/231,795.21
  6. Step 6: Final answer
    x = 177,229.71

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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.