Finding the Fourth Proportional to 78,701,243.20, 118,051,864.80 and 40,437,491.20
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Solution
The fourth proportional to 78,701,243.20, 118,051,864.80 and 40,437,491.20 is: 60,656,236.80
Step by Step Solution
- Step 1: Write the proportion equation
78,701,243.20 : 118,051,864.80 = 40,437,491.20 : x - Step 2: Convert to fraction form
78,701,243.20/118,051,864.80 = 40,437,491.20/x - Step 3: Cross multiply
78,701,243.20x = 118,051,864.80 × 40,437,491.20 - Step 4: Simplify right side
78,701,243.20x = 4,773,721,243,993,590 - Step 5: Solve for x
x = 4,773,721,243,993,590/78,701,243.20 - Step 6: Final answer
x = 60,656,236.80
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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.