Finding the Fourth Proportional to 87,818.99, 131,728.80 and 21,258.99
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Solution
The fourth proportional to 87,818.99, 131,728.80 and 21,258.99 is: 31,888.56
Step by Step Solution
- Step 1: Write the proportion equation
87,818.99 : 131,728.80 = 21,258.99 : x - Step 2: Convert to fraction form
87,818.99/131,728.80 = 21,258.99/x - Step 3: Cross multiply
87,818.99x = 131,728.80 × 21,258.99 - Step 4: Simplify right side
87,818.99x = 2,800,421,241.91 - Step 5: Solve for x
x = 2,800,421,241.91/87,818.99 - Step 6: Final answer
x = 31,888.56
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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.