Finding the Fourth Proportional to 129,621,442.17, 178,891,452.50 and 79,418,977.23
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Solution
The fourth proportional to 129,621,442.17, 178,891,452.50 and 79,418,977.23 is: 109,606,682.00
Step by Step Solution
- Step 1: Write the proportion equation
129,621,442.17 : 178,891,452.50 = 79,418,977.23 : x - Step 2: Convert to fraction form
129,621,442.17/178,891,452.50 = 79,418,977.23/x - Step 3: Cross multiply
129,621,442.17x = 178,891,452.50 × 79,418,977.23 - Step 4: Simplify right side
129,621,442.17x = 14,207,376,191,951,054 - Step 5: Solve for x
x = 14,207,376,191,951,054/129,621,442.17 - Step 6: Final answer
x = 109,606,682.00
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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.