Finding the Fourth Proportional to 121,938.62, 168,281.84 and 68,220.44
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Solution
The fourth proportional to 121,938.62, 168,281.84 and 68,220.44 is: 94,147.87
Step by Step Solution
- Step 1: Write the proportion equation
121,938.62 : 168,281.84 = 68,220.44 : x - Step 2: Convert to fraction form
121,938.62/168,281.84 = 68,220.44/x - Step 3: Cross multiply
121,938.62x = 168,281.84 × 68,220.44 - Step 4: Simplify right side
121,938.62x = 11,480,261,168.81 - Step 5: Solve for x
x = 11,480,261,168.81/121,938.62 - Step 6: Final answer
x = 94,147.87
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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.