Finding the Fourth Proportional to 121,839.22, 168,137.66 and 68,124.07
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Solution
The fourth proportional to 121,839.22, 168,137.66 and 68,124.07 is: 94,010.95
Step by Step Solution
- Step 1: Write the proportion equation
121,839.22 : 168,137.66 = 68,124.07 : x - Step 2: Convert to fraction form
121,839.22/168,137.66 = 68,124.07/x - Step 3: Cross multiply
121,839.22x = 168,137.66 × 68,124.07 - Step 4: Simplify right side
121,839.22x = 11,454,220,538.17 - Step 5: Solve for x
x = 11,454,220,538.17/121,839.22 - Step 6: Final answer
x = 94,010.95
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.