Finding the Fourth Proportional to 128,368.55, 192,553.37 and 84,274.31
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Solution
The fourth proportional to 128,368.55, 192,553.37 and 84,274.31 is: 126,411.82
Step by Step Solution
- Step 1: Write the proportion equation
128,368.55 : 192,553.37 = 84,274.31 : x - Step 2: Convert to fraction form
128,368.55/192,553.37 = 84,274.31/x - Step 3: Cross multiply
128,368.55x = 192,553.37 × 84,274.31 - Step 4: Simplify right side
128,368.55x = 16,227,301,010.79 - Step 5: Solve for x
x = 16,227,301,010.79/128,368.55 - Step 6: Final answer
x = 126,411.82
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1.5x scale
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.