Finding the Fourth Proportional to 208,079,138.80, 312,024,229.80 and 78,643,730.80
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Solution
The fourth proportional to 208,079,138.80, 312,024,229.80 and 78,643,730.80 is: 117,929,887.99
Step by Step Solution
- Step 1: Write the proportion equation
208,079,138.80 : 312,024,229.80 = 78,643,730.80 : x - Step 2: Convert to fraction form
208,079,138.80/312,024,229.80 = 78,643,730.80/x - Step 3: Cross multiply
208,079,138.80x = 312,024,229.80 × 78,643,730.80 - Step 4: Simplify right side
208,079,138.80x = 24,538,749,531,468,536 - Step 5: Solve for x
x = 24,538,749,531,468,536/208,079,138.80 - Step 6: Final answer
x = 117,929,887.99
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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.