Finding the Fourth Proportional to 78,322.20, 108,140.82 and 48,147.99
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Solution
The fourth proportional to 78,322.20, 108,140.82 and 48,147.99 is: 66,478.76
Step by Step Solution
- Step 1: Write the proportion equation
78,322.20 : 108,140.82 = 48,147.99 : x - Step 2: Convert to fraction form
78,322.20/108,140.82 = 48,147.99/x - Step 3: Cross multiply
78,322.20x = 108,140.82 × 48,147.99 - Step 4: Simplify right side
78,322.20x = 5,206,763,119.95 - Step 5: Solve for x
x = 5,206,763,119.95/78,322.20 - Step 6: Final answer
x = 66,478.76
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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.