Finding the Fourth Proportional to 86,266,121.20, 129,399,181.80 and 78,303,497.20
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Solution
The fourth proportional to 86,266,121.20, 129,399,181.80 and 78,303,497.20 is: 117,455,245.80
Step by Step Solution
- Step 1: Write the proportion equation
86,266,121.20 : 129,399,181.80 = 78,303,497.20 : x - Step 2: Convert to fraction form
86,266,121.20/129,399,181.80 = 78,303,497.20/x - Step 3: Cross multiply
86,266,121.20x = 129,399,181.80 × 78,303,497.20 - Step 4: Simplify right side
86,266,121.20x = 10,132,408,469,758,592 - Step 5: Solve for x
x = 10,132,408,469,758,592/86,266,121.20 - Step 6: Final answer
x = 117,455,245.80
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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.