Finding the Fourth Proportional to 128,895.12, 177,988.25 and 80,579.63
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Solution
The fourth proportional to 128,895.12, 177,988.25 and 80,579.63 is: 111,270.53
Step by Step Solution
- Step 1: Write the proportion equation
128,895.12 : 177,988.25 = 80,579.63 : x - Step 2: Convert to fraction form
128,895.12/177,988.25 = 80,579.63/x - Step 3: Cross multiply
128,895.12x = 177,988.25 × 80,579.63 - Step 4: Simplify right side
128,895.12x = 14,342,227,975.77 - Step 5: Solve for x
x = 14,342,227,975.77/128,895.12 - Step 6: Final answer
x = 111,270.53
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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.