Finding the Fourth Proportional to 128,844.20, 193,784.70 and 115,365.80
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Solution
The fourth proportional to 128,844.20, 193,784.70 and 115,365.80 is: 173,512.87
Step by Step Solution
- Step 1: Write the proportion equation
128,844.20 : 193,784.70 = 115,365.80 : x - Step 2: Convert to fraction form
128,844.20/193,784.70 = 115,365.80/x - Step 3: Cross multiply
128,844.20x = 193,784.70 × 115,365.80 - Step 4: Simplify right side
128,844.20x = 22,356,126,943.26 - Step 5: Solve for x
x = 22,356,126,943.26/128,844.20 - Step 6: Final answer
x = 173,512.87
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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.