Finding the Fourth Proportional to 106,990.91, 147,719.18 and 66,720.95
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Solution
The fourth proportional to 106,990.91, 147,719.18 and 66,720.95 is: 92,119.64
Step by Step Solution
- Step 1: Write the proportion equation
106,990.91 : 147,719.18 = 66,720.95 : x - Step 2: Convert to fraction form
106,990.91/147,719.18 = 66,720.95/x - Step 3: Cross multiply
106,990.91x = 147,719.18 × 66,720.95 - Step 4: Simplify right side
106,990.91x = 9,855,964,022.82 - Step 5: Solve for x
x = 9,855,964,022.82/106,990.91 - Step 6: Final answer
x = 92,119.64
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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.