Finding the Fourth Proportional to 239,932.21, 331,170.59 and 137,968.81
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Solution
The fourth proportional to 239,932.21, 331,170.59 and 137,968.81 is: 190,433.84
Step by Step Solution
- Step 1: Write the proportion equation
239,932.21 : 331,170.59 = 137,968.81 : x - Step 2: Convert to fraction form
239,932.21/331,170.59 = 137,968.81/x - Step 3: Cross multiply
239,932.21x = 331,170.59 × 137,968.81 - Step 4: Simplify right side
239,932.21x = 45,691,212,209.30 - Step 5: Solve for x
x = 45,691,212,209.30/239,932.21 - Step 6: Final answer
x = 190,433.84
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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.