Finding the Fourth Proportional to 129,214.26, 178,296.39 and 72,614.70
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Solution
The fourth proportional to 129,214.26, 178,296.39 and 72,614.70 is: 100,197.45
Step by Step Solution
- Step 1: Write the proportion equation
129,214.26 : 178,296.39 = 72,614.70 : x - Step 2: Convert to fraction form
129,214.26/178,296.39 = 72,614.70/x - Step 3: Cross multiply
129,214.26x = 178,296.39 × 72,614.70 - Step 4: Simplify right side
129,214.26x = 12,946,938,870.93 - Step 5: Solve for x
x = 12,946,938,870.93/129,214.26 - Step 6: Final answer
x = 100,197.45
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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.