Finding the Fourth Proportional to 78,488,431.20, 117,732,646.80 and 48,255,343.20
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Solution
The fourth proportional to 78,488,431.20, 117,732,646.80 and 48,255,343.20 is: 72,383,014.80
Step by Step Solution
- Step 1: Write the proportion equation
78,488,431.20 : 117,732,646.80 = 48,255,343.20 : x - Step 2: Convert to fraction form
78,488,431.20/117,732,646.80 = 48,255,343.20/x - Step 3: Cross multiply
78,488,431.20x = 117,732,646.80 × 48,255,343.20 - Step 4: Simplify right side
78,488,431.20x = 5,681,229,277,178,382 - Step 5: Solve for x
x = 5,681,229,277,178,382/78,488,431.20 - Step 6: Final answer
x = 72,383,014.80
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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.