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Finding the Fourth Proportional to 193,428.76, 266,863.26 and 126,399.64

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Solution

The fourth proportional to 193,428.76, 266,863.26 and 126,399.64 is: 174,386.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,428.76 : 266,863.26 = 126,399.64 : x
  2. Step 2: Convert to fraction form
    193,428.76/266,863.26 = 126,399.64/x
  3. Step 3: Cross multiply
    193,428.76x = 266,863.26 × 126,399.64
  4. Step 4: Simplify right side
    193,428.76x = 33,731,419,993.23
  5. Step 5: Solve for x
    x = 33,731,419,993.23/193,428.76
  6. Step 6: Final answer
    x = 174,386.79

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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.