Finding the Fourth Proportional to 81,664,879.70, 122,497,319.55 and 72,736,670.90
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Solution
The fourth proportional to 81,664,879.70, 122,497,319.55 and 72,736,670.90 is: 109,105,006.35
Step by Step Solution
- Step 1: Write the proportion equation
81,664,879.70 : 122,497,319.55 = 72,736,670.90 : x - Step 2: Convert to fraction form
81,664,879.70/122,497,319.55 = 72,736,670.90/x - Step 3: Cross multiply
81,664,879.70x = 122,497,319.55 × 72,736,670.90 - Step 4: Simplify right side
81,664,879.70x = 8,910,047,218,240,487 - Step 5: Solve for x
x = 8,910,047,218,240,487/81,664,879.70 - Step 6: Final answer
x = 109,105,006.35
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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.