Finding the Fourth Proportional to 139,336.99, 192,287.25 and 78,905.99
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Solution
The fourth proportional to 139,336.99, 192,287.25 and 78,905.99 is: 108,891.52
Step by Step Solution
- Step 1: Write the proportion equation
139,336.99 : 192,287.25 = 78,905.99 : x - Step 2: Convert to fraction form
139,336.99/192,287.25 = 78,905.99/x - Step 3: Cross multiply
139,336.99x = 192,287.25 × 78,905.99 - Step 4: Simplify right side
139,336.99x = 15,172,615,825.63 - Step 5: Solve for x
x = 15,172,615,825.63/139,336.99 - Step 6: Final answer
x = 108,891.52
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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.