Finding the Fourth Proportional to 91,217.05, 125,878.21 and 50,931.44
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Solution
The fourth proportional to 91,217.05, 125,878.21 and 50,931.44 is: 70,284.65
Step by Step Solution
- Step 1: Write the proportion equation
91,217.05 : 125,878.21 = 50,931.44 : x - Step 2: Convert to fraction form
91,217.05/125,878.21 = 50,931.44/x - Step 3: Cross multiply
91,217.05x = 125,878.21 × 50,931.44 - Step 4: Simplify right side
91,217.05x = 6,411,158,499.92 - Step 5: Solve for x
x = 6,411,158,499.92/91,217.05 - Step 6: Final answer
x = 70,284.65
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1.5x scale
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.