Finding the Fourth Proportional to 74,121.52, 102,286.94 and 40,129.10
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Solution
The fourth proportional to 74,121.52, 102,286.94 and 40,129.10 is: 55,377.75
Step by Step Solution
- Step 1: Write the proportion equation
74,121.52 : 102,286.94 = 40,129.10 : x - Step 2: Convert to fraction form
74,121.52/102,286.94 = 40,129.10/x - Step 3: Cross multiply
74,121.52x = 102,286.94 × 40,129.10 - Step 4: Simplify right side
74,121.52x = 4,104,683,199.99 - Step 5: Solve for x
x = 4,104,683,199.99/74,121.52 - Step 6: Final answer
x = 55,377.75
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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.