Finding the Fourth Proportional to 129,813.40, 194,720.10 and 79,949.80
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Solution
The fourth proportional to 129,813.40, 194,720.10 and 79,949.80 is: 119,924.70
Step by Step Solution
- Step 1: Write the proportion equation
129,813.40 : 194,720.10 = 79,949.80 : x - Step 2: Convert to fraction form
129,813.40/194,720.10 = 79,949.80/x - Step 3: Cross multiply
129,813.40x = 194,720.10 × 79,949.80 - Step 4: Simplify right side
129,813.40x = 15,567,833,050.98 - Step 5: Solve for x
x = 15,567,833,050.98/129,813.40 - Step 6: Final answer
x = 119,924.70
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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.