Finding the Fourth Proportional to 87,391.85, 131,004.72 and 55,712.99
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Solution
The fourth proportional to 87,391.85, 131,004.72 and 55,712.99 is: 83,516.55
Step by Step Solution
- Step 1: Write the proportion equation
87,391.85 : 131,004.72 = 55,712.99 : x - Step 2: Convert to fraction form
87,391.85/131,004.72 = 55,712.99/x - Step 3: Cross multiply
87,391.85x = 131,004.72 × 55,712.99 - Step 4: Simplify right side
87,391.85x = 7,298,664,982.82 - Step 5: Solve for x
x = 7,298,664,982.82/87,391.85 - Step 6: Final answer
x = 83,516.55
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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.