Finding the Fourth Proportional to 76,940.64, 115,409.74 and 39,479.08
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Solution
The fourth proportional to 76,940.64, 115,409.74 and 39,479.08 is: 59,217.99
Step by Step Solution
- Step 1: Write the proportion equation
76,940.64 : 115,409.74 = 39,479.08 : x - Step 2: Convert to fraction form
76,940.64/115,409.74 = 39,479.08/x - Step 3: Cross multiply
76,940.64x = 115,409.74 × 39,479.08 - Step 4: Simplify right side
76,940.64x = 4,556,270,358.24 - Step 5: Solve for x
x = 4,556,270,358.24/76,940.64 - Step 6: Final answer
x = 59,217.99
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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.