Home / 231,935.72-320,015.81-135,080.78

Finding the Fourth Proportional to 231,935.72, 320,015.81 and 135,080.78

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Solution

The fourth proportional to 231,935.72, 320,015.81 and 135,080.78 is: 186,379.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,935.72 : 320,015.81 = 135,080.78 : x
  2. Step 2: Convert to fraction form
    231,935.72/320,015.81 = 135,080.78/x
  3. Step 3: Cross multiply
    231,935.72x = 320,015.81 × 135,080.78
  4. Step 4: Simplify right side
    231,935.72x = 43,227,982,951.65
  5. Step 5: Solve for x
    x = 43,227,982,951.65/231,935.72
  6. Step 6: Final answer
    x = 186,379.16

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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.