Finding the Fourth Proportional to 81,075.62, 121,081.14 and 69,101.80
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Solution
The fourth proportional to 81,075.62, 121,081.14 and 69,101.80 is: 103,199.02
Step by Step Solution
- Step 1: Write the proportion equation
81,075.62 : 121,081.14 = 69,101.80 : x - Step 2: Convert to fraction form
81,075.62/121,081.14 = 69,101.80/x - Step 3: Cross multiply
81,075.62x = 121,081.14 × 69,101.80 - Step 4: Simplify right side
81,075.62x = 8,366,924,720.05 - Step 5: Solve for x
x = 8,366,924,720.05/81,075.62 - Step 6: Final answer
x = 103,199.02
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.