Finding the Fourth Proportional to 128,078.60, 192,106.36 and 90,798.44
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Solution
The fourth proportional to 128,078.60, 192,106.36 and 90,798.44 is: 136,189.48
Step by Step Solution
- Step 1: Write the proportion equation
128,078.60 : 192,106.36 = 90,798.44 : x - Step 2: Convert to fraction form
128,078.60/192,106.36 = 90,798.44/x - Step 3: Cross multiply
128,078.60x = 192,106.36 × 90,798.44 - Step 4: Simplify right side
128,078.60x = 17,442,957,802.08 - Step 5: Solve for x
x = 17,442,957,802.08/128,078.60 - Step 6: Final answer
x = 136,189.48
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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.