Finding the Fourth Proportional to 81,169.95, 121,754.97 and 53,113.62
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Solution
The fourth proportional to 81,169.95, 121,754.97 and 53,113.62 is: 79,670.46
Step by Step Solution
- Step 1: Write the proportion equation
81,169.95 : 121,754.97 = 53,113.62 : x - Step 2: Convert to fraction form
81,169.95/121,754.97 = 53,113.62/x - Step 3: Cross multiply
81,169.95x = 121,754.97 × 53,113.62 - Step 4: Simplify right side
81,169.95x = 6,466,847,209.69 - Step 5: Solve for x
x = 6,466,847,209.69/81,169.95 - Step 6: Final answer
x = 79,670.46
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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.