Finding the Fourth Proportional to 128,895,643.40, 193,343,465.10 and 77,934,849.80
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Solution
The fourth proportional to 128,895,643.40, 193,343,465.10 and 77,934,849.80 is: 116,902,274.70
Step by Step Solution
- Step 1: Write the proportion equation
128,895,643.40 : 193,343,465.10 = 77,934,849.80 : x - Step 2: Convert to fraction form
128,895,643.40/193,343,465.10 = 77,934,849.80/x - Step 3: Cross multiply
128,895,643.40x = 193,343,465.10 × 77,934,849.80 - Step 4: Simplify right side
128,895,643.40x = 15,068,193,912,380,040 - Step 5: Solve for x
x = 15,068,193,912,380,040/128,895,643.40 - Step 6: Final answer
x = 116,902,274.70
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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.