Finding the Fourth Proportional to 128,821.39, 193,090.23 and 97,129.84
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Solution
The fourth proportional to 128,821.39, 193,090.23 and 97,129.84 is: 145,587.80
Step by Step Solution
- Step 1: Write the proportion equation
128,821.39 : 193,090.23 = 97,129.84 : x - Step 2: Convert to fraction form
128,821.39/193,090.23 = 97,129.84/x - Step 3: Cross multiply
128,821.39x = 193,090.23 × 97,129.84 - Step 4: Simplify right side
128,821.39x = 18,754,822,855.07 - Step 5: Solve for x
x = 18,754,822,855.07/128,821.39 - Step 6: Final answer
x = 145,587.80
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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.