Finding the Fourth Proportional to 153,121.29, 211,307.19 and 85,136.13
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Solution
The fourth proportional to 153,121.29, 211,307.19 and 85,136.13 is: 117,487.75
Step by Step Solution
- Step 1: Write the proportion equation
153,121.29 : 211,307.19 = 85,136.13 : x - Step 2: Convert to fraction form
153,121.29/211,307.19 = 85,136.13/x - Step 3: Cross multiply
153,121.29x = 211,307.19 × 85,136.13 - Step 4: Simplify right side
153,121.29x = 17,989,876,397.77 - Step 5: Solve for x
x = 17,989,876,397.77/153,121.29 - Step 6: Final answer
x = 117,487.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.