Finding the Fourth Proportional to 74,629.19, 102,986.81 and 40,638.09
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Solution
The fourth proportional to 74,629.19, 102,986.81 and 40,638.09 is: 56,079.75
Step by Step Solution
- Step 1: Write the proportion equation
74,629.19 : 102,986.81 = 40,638.09 : x - Step 2: Convert to fraction form
74,629.19/102,986.81 = 40,638.09/x - Step 3: Cross multiply
74,629.19x = 102,986.81 × 40,638.09 - Step 4: Simplify right side
74,629.19x = 4,185,186,535.47 - Step 5: Solve for x
x = 4,185,186,535.47/74,629.19 - Step 6: Final answer
x = 56,079.75
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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.