Finding the Fourth Proportional to 85,660.13, 128,520.62 and 38,270.88
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Solution
The fourth proportional to 85,660.13, 128,520.62 and 38,270.88 is: 57,419.91
Step by Step Solution
- Step 1: Write the proportion equation
85,660.13 : 128,520.62 = 38,270.88 : x - Step 2: Convert to fraction form
85,660.13/128,520.62 = 38,270.88/x - Step 3: Cross multiply
85,660.13x = 128,520.62 × 38,270.88 - Step 4: Simplify right side
85,660.13x = 4,918,596,391.59 - Step 5: Solve for x
x = 4,918,596,391.59/85,660.13 - Step 6: Final answer
x = 57,419.91
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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.