Finding the Fourth Proportional to 85,724.60, 128,635.49 and 46,280.84
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Solution
The fourth proportional to 85,724.60, 128,635.49 and 46,280.84 is: 69,447.49
Step by Step Solution
- Step 1: Write the proportion equation
85,724.60 : 128,635.49 = 46,280.84 : x - Step 2: Convert to fraction form
85,724.60/128,635.49 = 46,280.84/x - Step 3: Cross multiply
85,724.60x = 128,635.49 × 46,280.84 - Step 4: Simplify right side
85,724.60x = 5,953,358,003.54 - Step 5: Solve for x
x = 5,953,358,003.54/85,724.60 - Step 6: Final answer
x = 69,447.49
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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.