Finding the Fourth Proportional to 135,739.28, 203,660.76 and 76,641.68
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Solution
The fourth proportional to 135,739.28, 203,660.76 and 76,641.68 is: 114,991.79
Step by Step Solution
- Step 1: Write the proportion equation
135,739.28 : 203,660.76 = 76,641.68 : x - Step 2: Convert to fraction form
135,739.28/203,660.76 = 76,641.68/x - Step 3: Cross multiply
135,739.28x = 203,660.76 × 76,641.68 - Step 4: Simplify right side
135,739.28x = 15,608,902,796.48 - Step 5: Solve for x
x = 15,608,902,796.48/135,739.28 - Step 6: Final answer
x = 114,991.79
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.