Finding the Fourth Proportional to 85,811.70, 128,717.55 and 48,947.70
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Solution
The fourth proportional to 85,811.70, 128,717.55 and 48,947.70 is: 73,421.55
Step by Step Solution
- Step 1: Write the proportion equation
85,811.70 : 128,717.55 = 48,947.70 : x - Step 2: Convert to fraction form
85,811.70/128,717.55 = 48,947.70/x - Step 3: Cross multiply
85,811.70x = 128,717.55 × 48,947.70 - Step 4: Simplify right side
85,811.70x = 6,300,428,022.14 - Step 5: Solve for x
x = 6,300,428,022.14/85,811.70 - Step 6: Final answer
x = 73,421.55
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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.