Finding the Fourth Proportional to 85,489.02, 128,248.29 and 38,120.94
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Solution
The fourth proportional to 85,489.02, 128,248.29 and 38,120.94 is: 57,187.99
Step by Step Solution
- Step 1: Write the proportion equation
85,489.02 : 128,248.29 = 38,120.94 : x - Step 2: Convert to fraction form
85,489.02/128,248.29 = 38,120.94/x - Step 3: Cross multiply
85,489.02x = 128,248.29 × 38,120.94 - Step 4: Simplify right side
85,489.02x = 4,888,945,368.19 - Step 5: Solve for x
x = 4,888,945,368.19/85,489.02 - Step 6: Final answer
x = 57,187.99
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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.