Finding the Fourth Proportional to 81,239.22, 121,771.35 and 77,514.66
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Solution
The fourth proportional to 81,239.22, 121,771.35 and 77,514.66 is: 116,188.52
Step by Step Solution
- Step 1: Write the proportion equation
81,239.22 : 121,771.35 = 77,514.66 : x - Step 2: Convert to fraction form
81,239.22/121,771.35 = 77,514.66/x - Step 3: Cross multiply
81,239.22x = 121,771.35 × 77,514.66 - Step 4: Simplify right side
81,239.22x = 9,439,064,792.99 - Step 5: Solve for x
x = 9,439,064,792.99/81,239.22 - Step 6: Final answer
x = 116,188.52
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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.