Finding the Fourth Proportional to 78,880.68, 108,857.18 and 43,070.99
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Solution
The fourth proportional to 78,880.68, 108,857.18 and 43,070.99 is: 59,438.97
Step by Step Solution
- Step 1: Write the proportion equation
78,880.68 : 108,857.18 = 43,070.99 : x - Step 2: Convert to fraction form
78,880.68/108,857.18 = 43,070.99/x - Step 3: Cross multiply
78,880.68x = 108,857.18 × 43,070.99 - Step 4: Simplify right side
78,880.68x = 4,688,586,074.60 - Step 5: Solve for x
x = 4,688,586,074.60/78,880.68 - Step 6: Final answer
x = 59,438.97
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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.