Finding the Fourth Proportional to 121,918.78, 168,251.28 and 68,213.08
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Solution
The fourth proportional to 121,918.78, 168,251.28 and 68,213.08 is: 94,135.93
Step by Step Solution
- Step 1: Write the proportion equation
121,918.78 : 168,251.28 = 68,213.08 : x - Step 2: Convert to fraction form
121,918.78/168,251.28 = 68,213.08/x - Step 3: Cross multiply
121,918.78x = 168,251.28 × 68,213.08 - Step 4: Simplify right side
121,918.78x = 11,476,938,022.74 - Step 5: Solve for x
x = 11,476,938,022.74/121,918.78 - Step 6: Final answer
x = 94,135.93
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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.