Finding the Fourth Proportional to 122,019,639.75, 168,411,543.12 and 72,487,530.09
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Solution
The fourth proportional to 122,019,639.75, 168,411,543.12 and 72,487,530.09 is: 100,047,310.62
Step by Step Solution
- Step 1: Write the proportion equation
122,019,639.75 : 168,411,543.12 = 72,487,530.09 : x - Step 2: Convert to fraction form
122,019,639.75/168,411,543.12 = 72,487,530.09/x - Step 3: Cross multiply
122,019,639.75x = 168,411,543.12 × 72,487,530.09 - Step 4: Simplify right side
122,019,639.75x = 12,207,736,799,414,334 - Step 5: Solve for x
x = 12,207,736,799,414,334/122,019,639.75 - Step 6: Final answer
x = 100,047,310.62
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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.