Finding the Fourth Proportional to 239,939.21, 331,135.70 and 137,997.68
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Solution
The fourth proportional to 239,939.21, 331,135.70 and 137,997.68 is: 190,448.05
Step by Step Solution
- Step 1: Write the proportion equation
239,939.21 : 331,135.70 = 137,997.68 : x - Step 2: Convert to fraction form
239,939.21/331,135.70 = 137,997.68/x - Step 3: Cross multiply
239,939.21x = 331,135.70 × 137,997.68 - Step 4: Simplify right side
239,939.21x = 45,695,956,019.51 - Step 5: Solve for x
x = 45,695,956,019.51/239,939.21 - Step 6: Final answer
x = 190,448.05
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1.5x scale
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.