Finding the Fourth Proportional to 78,286.85, 117,428.91 and 54,248.99
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Solution
The fourth proportional to 78,286.85, 117,428.91 and 54,248.99 is: 81,372.54
Step by Step Solution
- Step 1: Write the proportion equation
78,286.85 : 117,428.91 = 54,248.99 : x - Step 2: Convert to fraction form
78,286.85/117,428.91 = 54,248.99/x - Step 3: Cross multiply
78,286.85x = 117,428.91 × 54,248.99 - Step 4: Simplify right side
78,286.85x = 6,370,400,091.99 - Step 5: Solve for x
x = 6,370,400,091.99/78,286.85 - Step 6: Final answer
x = 81,372.54
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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.