Finding the Fourth Proportional to 420,129,324.15, 630,287,678.39 and 129,025,824.99
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Solution
The fourth proportional to 420,129,324.15, 630,287,678.39 and 129,025,824.99 is: 193,567,511.26
Step by Step Solution
- Step 1: Write the proportion equation
420,129,324.15 : 630,287,678.39 = 129,025,824.99 : x - Step 2: Convert to fraction form
420,129,324.15/630,287,678.39 = 129,025,824.99/x - Step 3: Cross multiply
420,129,324.15x = 630,287,678.39 × 129,025,824.99 - Step 4: Simplify right side
420,129,324.15x = 81,323,387,684,656,416 - Step 5: Solve for x
x = 81,323,387,684,656,416/420,129,324.15 - Step 6: Final answer
x = 193,567,511.26
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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.