Finding the Fourth Proportional to 81,437.20, 121,987.66 and 60,400.99
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Solution
The fourth proportional to 81,437.20, 121,987.66 and 60,400.99 is: 90,476.78
Step by Step Solution
- Step 1: Write the proportion equation
81,437.20 : 121,987.66 = 60,400.99 : x - Step 2: Convert to fraction form
81,437.20/121,987.66 = 60,400.99/x - Step 3: Cross multiply
81,437.20x = 121,987.66 × 60,400.99 - Step 4: Simplify right side
81,437.20x = 7,368,175,431.78 - Step 5: Solve for x
x = 7,368,175,431.78/81,437.20 - Step 6: Final answer
x = 90,476.78
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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.