Finding the Fourth Proportional to 129,132.26, 178,201.57 and 72,543.63
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Solution
The fourth proportional to 129,132.26, 178,201.57 and 72,543.63 is: 100,109.68
Step by Step Solution
- Step 1: Write the proportion equation
129,132.26 : 178,201.57 = 72,543.63 : x - Step 2: Convert to fraction form
129,132.26/178,201.57 = 72,543.63/x - Step 3: Cross multiply
129,132.26x = 178,201.57 × 72,543.63 - Step 4: Simplify right side
129,132.26x = 12,927,389,382.42 - Step 5: Solve for x
x = 12,927,389,382.42/129,132.26 - Step 6: Final answer
x = 100,109.68
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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.