Finding the Fourth Proportional to 121,853.60, 168,158.51 and 68,138.63
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Solution
The fourth proportional to 121,853.60, 168,158.51 and 68,138.63 is: 94,031.62
Step by Step Solution
- Step 1: Write the proportion equation
121,853.60 : 168,158.51 = 68,138.63 : x - Step 2: Convert to fraction form
121,853.60/168,158.51 = 68,138.63/x - Step 3: Cross multiply
121,853.60x = 168,158.51 × 68,138.63 - Step 4: Simplify right side
121,853.60x = 11,458,091,528.04 - Step 5: Solve for x
x = 11,458,091,528.04/121,853.60 - Step 6: Final answer
x = 94,031.62
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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.