Finding the Fourth Proportional to 129,810.05, 194,715.08 and 54,905.30
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Solution
The fourth proportional to 129,810.05, 194,715.08 and 54,905.30 is: 82,357.95
Step by Step Solution
- Step 1: Write the proportion equation
129,810.05 : 194,715.08 = 54,905.30 : x - Step 2: Convert to fraction form
129,810.05/194,715.08 = 54,905.30/x - Step 3: Cross multiply
129,810.05x = 194,715.08 × 54,905.30 - Step 4: Simplify right side
129,810.05x = 10,690,889,607.40 - Step 5: Solve for x
x = 10,690,889,607.40/129,810.05 - Step 6: Final answer
x = 82,357.95
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1.5x scale
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.