Finding the Fourth Proportional to 76,638,703.80, 114,958,055.70 and 69,080,431.80
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Solution
The fourth proportional to 76,638,703.80, 114,958,055.70 and 69,080,431.80 is: 103,620,647.70
Step by Step Solution
- Step 1: Write the proportion equation
76,638,703.80 : 114,958,055.70 = 69,080,431.80 : x - Step 2: Convert to fraction form
76,638,703.80/114,958,055.70 = 69,080,431.80/x - Step 3: Cross multiply
76,638,703.80x = 114,958,055.70 × 69,080,431.80 - Step 4: Simplify right side
76,638,703.80x = 7,941,352,126,644,451 - Step 5: Solve for x
x = 7,941,352,126,644,451/76,638,703.80 - Step 6: Final answer
x = 103,620,647.70
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1.5x scale
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.