Finding the Fourth Proportional to 85,921,512.29, 128,965,503.31 and 81,255,314.99
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Solution
The fourth proportional to 85,921,512.29, 128,965,503.31 and 81,255,314.99 is: 121,961,687.07
Step by Step Solution
- Step 1: Write the proportion equation
85,921,512.29 : 128,965,503.31 = 81,255,314.99 : x - Step 2: Convert to fraction form
85,921,512.29/128,965,503.31 = 81,255,314.99/x - Step 3: Cross multiply
85,921,512.29x = 128,965,503.31 × 81,255,314.99 - Step 4: Simplify right side
85,921,512.29x = 10,479,132,593,691,782 - Step 5: Solve for x
x = 10,479,132,593,691,782/85,921,512.29 - Step 6: Final answer
x = 121,961,687.07
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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.