Finding the Fourth Proportional to 121,838.40, 168,135.84 and 68,122.80
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Solution
The fourth proportional to 121,838.40, 168,135.84 and 68,122.80 is: 94,008.82
Step by Step Solution
- Step 1: Write the proportion equation
121,838.40 : 168,135.84 = 68,122.80 : x - Step 2: Convert to fraction form
121,838.40/168,135.84 = 68,122.80/x - Step 3: Cross multiply
121,838.40x = 168,135.84 × 68,122.80 - Step 4: Simplify right side
121,838.40x = 11,453,884,201.15 - Step 5: Solve for x
x = 11,453,884,201.15/121,838.40 - Step 6: Final answer
x = 94,008.82
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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.