Finding the Fourth Proportional to 81,175.59, 121,775.54 and 28,575.81
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Solution
The fourth proportional to 81,175.59, 121,775.54 and 28,575.81 is: 42,867.99
Step by Step Solution
- Step 1: Write the proportion equation
81,175.59 : 121,775.54 = 28,575.81 : x - Step 2: Convert to fraction form
81,175.59/121,775.54 = 28,575.81/x - Step 3: Cross multiply
81,175.59x = 121,775.54 × 28,575.81 - Step 4: Simplify right side
81,175.59x = 3,479,834,550.81 - Step 5: Solve for x
x = 3,479,834,550.81/81,175.59 - Step 6: Final answer
x = 42,867.99
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1.5x scale
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.