Finding the Fourth Proportional to 129,115.15, 193,672.86 and 40,369.12
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Solution
The fourth proportional to 129,115.15, 193,672.86 and 40,369.12 is: 60,553.72
Step by Step Solution
- Step 1: Write the proportion equation
129,115.15 : 193,672.86 = 40,369.12 : x - Step 2: Convert to fraction form
129,115.15/193,672.86 = 40,369.12/x - Step 3: Cross multiply
129,115.15x = 193,672.86 × 40,369.12 - Step 4: Simplify right side
129,115.15x = 7,818,402,926.08 - Step 5: Solve for x
x = 7,818,402,926.08/129,115.15 - Step 6: Final answer
x = 60,553.72
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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.