Finding the Fourth Proportional to 85,494.36, 128,243.73 and 40,505.18
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Solution
The fourth proportional to 85,494.36, 128,243.73 and 40,505.18 is: 60,758.81
Step by Step Solution
- Step 1: Write the proportion equation
85,494.36 : 128,243.73 = 40,505.18 : x - Step 2: Convert to fraction form
85,494.36/128,243.73 = 40,505.18/x - Step 3: Cross multiply
85,494.36x = 128,243.73 × 40,505.18 - Step 4: Simplify right side
85,494.36x = 5,194,535,688.13 - Step 5: Solve for x
x = 5,194,535,688.13/85,494.36 - Step 6: Final answer
x = 60,758.81
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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.