Finding the Fourth Proportional to 128,218.19, 192,307.84 and 45,092.75
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Solution
The fourth proportional to 128,218.19, 192,307.84 and 45,092.75 is: 67,632.29
Step by Step Solution
- Step 1: Write the proportion equation
128,218.19 : 192,307.84 = 45,092.75 : x - Step 2: Convert to fraction form
128,218.19/192,307.84 = 45,092.75/x - Step 3: Cross multiply
128,218.19x = 192,307.84 × 45,092.75 - Step 4: Simplify right side
128,218.19x = 8,671,689,352.16 - Step 5: Solve for x
x = 8,671,689,352.16/128,218.19 - Step 6: Final answer
x = 67,632.29
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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.