Finding the Fourth Proportional to 86,431.63, 129,702.12 and 33,839.75
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Solution
The fourth proportional to 86,431.63, 129,702.12 and 33,839.75 is: 50,781.03
Step by Step Solution
- Step 1: Write the proportion equation
86,431.63 : 129,702.12 = 33,839.75 : x - Step 2: Convert to fraction form
86,431.63/129,702.12 = 33,839.75/x - Step 3: Cross multiply
86,431.63x = 129,702.12 × 33,839.75 - Step 4: Simplify right side
86,431.63x = 4,389,087,315.27 - Step 5: Solve for x
x = 4,389,087,315.27/86,431.63 - Step 6: Final answer
x = 50,781.03
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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.