Finding the Fourth Proportional to 78,732,163.20, 118,098,244.80 and 38,421,379.20
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Solution
The fourth proportional to 78,732,163.20, 118,098,244.80 and 38,421,379.20 is: 57,632,068.80
Step by Step Solution
- Step 1: Write the proportion equation
78,732,163.20 : 118,098,244.80 = 38,421,379.20 : x - Step 2: Convert to fraction form
78,732,163.20/118,098,244.80 = 38,421,379.20/x - Step 3: Cross multiply
78,732,163.20x = 118,098,244.80 × 38,421,379.20 - Step 4: Simplify right side
78,732,163.20x = 4,537,497,446,315,228 - Step 5: Solve for x
x = 4,537,497,446,315,228/78,732,163.20 - Step 6: Final answer
x = 57,632,068.80
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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.