Finding the Fourth Proportional to 129,420.40, 194,127.36 and 40,661.68
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Solution
The fourth proportional to 129,420.40, 194,127.36 and 40,661.68 is: 60,991.50
Step by Step Solution
- Step 1: Write the proportion equation
129,420.40 : 194,127.36 = 40,661.68 : x - Step 2: Convert to fraction form
129,420.40/194,127.36 = 40,661.68/x - Step 3: Cross multiply
129,420.40x = 194,127.36 × 40,661.68 - Step 4: Simplify right side
129,420.40x = 7,893,544,591.56 - Step 5: Solve for x
x = 7,893,544,591.56/129,420.40 - Step 6: Final answer
x = 60,991.50
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1.5x scale
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.