Finding the Fourth Proportional to 154,195.68, 212,825.64 and 100,387.08
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Solution
The fourth proportional to 154,195.68, 212,825.64 and 100,387.08 is: 138,557.35
Step by Step Solution
- Step 1: Write the proportion equation
154,195.68 : 212,825.64 = 100,387.08 : x - Step 2: Convert to fraction form
154,195.68/212,825.64 = 100,387.08/x - Step 3: Cross multiply
154,195.68x = 212,825.64 × 100,387.08 - Step 4: Simplify right side
154,195.68x = 21,364,944,548.73 - Step 5: Solve for x
x = 21,364,944,548.73/154,195.68 - Step 6: Final answer
x = 138,557.35
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1.5x scale
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.