Finding the Fourth Proportional to 77,985,629.23, 107,623,531.62 and 43,178,320.15
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Solution
The fourth proportional to 77,985,629.23, 107,623,531.62 and 43,178,320.15 is: 59,587,943.96
Step by Step Solution
- Step 1: Write the proportion equation
77,985,629.23 : 107,623,531.62 = 43,178,320.15 : x - Step 2: Convert to fraction form
77,985,629.23/107,623,531.62 = 43,178,320.15/x - Step 3: Cross multiply
77,985,629.23x = 107,623,531.62 × 43,178,320.15 - Step 4: Simplify right side
77,985,629.23x = 4,647,003,303,962,008 - Step 5: Solve for x
x = 4,647,003,303,962,008/77,985,629.23 - Step 6: Final answer
x = 59,587,943.96
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.