Finding the Fourth Proportional to 128,549.16, 193,119.74 and 91,201.96
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Solution
The fourth proportional to 128,549.16, 193,119.74 and 91,201.96 is: 137,012.94
Step by Step Solution
- Step 1: Write the proportion equation
128,549.16 : 193,119.74 = 91,201.96 : x - Step 2: Convert to fraction form
128,549.16/193,119.74 = 91,201.96/x - Step 3: Cross multiply
128,549.16x = 193,119.74 × 91,201.96 - Step 4: Simplify right side
128,549.16x = 17,612,898,802.69 - Step 5: Solve for x
x = 17,612,898,802.69/128,549.16 - Step 6: Final answer
x = 137,012.94
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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.