Finding the Fourth Proportional to 78,323.20, 108,142.20 and 48,148.99
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Solution
The fourth proportional to 78,323.20, 108,142.20 and 48,148.99 is: 66,480.15
Step by Step Solution
- Step 1: Write the proportion equation
78,323.20 : 108,142.20 = 48,148.99 : x - Step 2: Convert to fraction form
78,323.20/108,142.20 = 48,148.99/x - Step 3: Cross multiply
78,323.20x = 108,142.20 × 48,148.99 - Step 4: Simplify right side
78,323.20x = 5,206,937,706.38 - Step 5: Solve for x
x = 5,206,937,706.38/78,323.20 - Step 6: Final answer
x = 66,480.15
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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.