Finding the Fourth Proportional to 128,895,702.40, 193,343,553.60 and 77,934,908.80
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Solution
The fourth proportional to 128,895,702.40, 193,343,553.60 and 77,934,908.80 is: 116,902,363.20
Step by Step Solution
- Step 1: Write the proportion equation
128,895,702.40 : 193,343,553.60 = 77,934,908.80 : x - Step 2: Convert to fraction form
128,895,702.40/193,343,553.60 = 77,934,908.80/x - Step 3: Cross multiply
128,895,702.40x = 193,343,553.60 × 77,934,908.80 - Step 4: Simplify right side
128,895,702.40x = 15,068,212,216,883,910 - Step 5: Solve for x
x = 15,068,212,216,883,910/128,895,702.40 - Step 6: Final answer
x = 116,902,363.20
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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.