Finding the Fourth Proportional to 128,740.20, 193,628.70 and 115,261.80
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Solution
The fourth proportional to 128,740.20, 193,628.70 and 115,261.80 is: 173,356.83
Step by Step Solution
- Step 1: Write the proportion equation
128,740.20 : 193,628.70 = 115,261.80 : x - Step 2: Convert to fraction form
128,740.20/193,628.70 = 115,261.80/x - Step 3: Cross multiply
128,740.20x = 193,628.70 × 115,261.80 - Step 4: Simplify right side
128,740.20x = 22,317,992,493.66 - Step 5: Solve for x
x = 22,317,992,493.66/128,740.20 - Step 6: Final answer
x = 173,356.83
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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.