Finding the Fourth Proportional to 129,312.36, 193,968.54 and 40,572.96
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Solution
The fourth proportional to 129,312.36, 193,968.54 and 40,572.96 is: 60,859.44
Step by Step Solution
- Step 1: Write the proportion equation
129,312.36 : 193,968.54 = 40,572.96 : x - Step 2: Convert to fraction form
129,312.36/193,968.54 = 40,572.96/x - Step 3: Cross multiply
129,312.36x = 193,968.54 × 40,572.96 - Step 4: Simplify right side
129,312.36x = 7,869,877,814.68 - Step 5: Solve for x
x = 7,869,877,814.68/129,312.36 - Step 6: Final answer
x = 60,859.44
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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.