Finding the Fourth Proportional to 85,715.36, 118,292.64 and 47,991.68
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Solution
The fourth proportional to 85,715.36, 118,292.64 and 47,991.68 is: 66,231.57
Step by Step Solution
- Step 1: Write the proportion equation
85,715.36 : 118,292.64 = 47,991.68 : x - Step 2: Convert to fraction form
85,715.36/118,292.64 = 47,991.68/x - Step 3: Cross multiply
85,715.36x = 118,292.64 × 47,991.68 - Step 4: Simplify right side
85,715.36x = 5,677,062,525.24 - Step 5: Solve for x
x = 5,677,062,525.24/85,715.36 - Step 6: Final answer
x = 66,231.57
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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.