Finding the Fourth Proportional to 128,433.75, 177,274.19 and 74,729.14
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Solution
The fourth proportional to 128,433.75, 177,274.19 and 74,729.14 is: 103,146.94
Step by Step Solution
- Step 1: Write the proportion equation
128,433.75 : 177,274.19 = 74,729.14 : x - Step 2: Convert to fraction form
128,433.75/177,274.19 = 74,729.14/x - Step 3: Cross multiply
128,433.75x = 177,274.19 × 74,729.14 - Step 4: Simplify right side
128,433.75x = 13,247,547,762.90 - Step 5: Solve for x
x = 13,247,547,762.90/128,433.75 - Step 6: Final answer
x = 103,146.94
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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.