Finding the Fourth Proportional to 81,119.90, 121,686.15 and 28,541.18
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Solution
The fourth proportional to 81,119.90, 121,686.15 and 28,541.18 is: 42,813.99
Step by Step Solution
- Step 1: Write the proportion equation
81,119.90 : 121,686.15 = 28,541.18 : x - Step 2: Convert to fraction form
81,119.90/121,686.15 = 28,541.18/x - Step 3: Cross multiply
81,119.90x = 121,686.15 × 28,541.18 - Step 4: Simplify right side
81,119.90x = 3,473,066,310.66 - Step 5: Solve for x
x = 3,473,066,310.66/81,119.90 - Step 6: Final answer
x = 42,813.99
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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.