Finding the Fourth Proportional to 126,376.58, 189,646.36 and 81,393.23
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Solution
The fourth proportional to 126,376.58, 189,646.36 and 81,393.23 is: 122,142.33
Step by Step Solution
- Step 1: Write the proportion equation
126,376.58 : 189,646.36 = 81,393.23 : x - Step 2: Convert to fraction form
126,376.58/189,646.36 = 81,393.23/x - Step 3: Cross multiply
126,376.58x = 189,646.36 × 81,393.23 - Step 4: Simplify right side
126,376.58x = 15,435,930,068.78 - Step 5: Solve for x
x = 15,435,930,068.78/126,376.58 - Step 6: Final answer
x = 122,142.33
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.