Finding the Third Proportional to 87,121.13 and 128,130.19
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Solution
The third proportional to 87,121.13 and 128,130.19 is: 188,442.76
Step by Step Solution
- Step 1: Write the proportion equation
87,121.13 : 128,130.19 = 128,130.19 : x - Step 2: Convert to fraction form
87,121.13/128,130.19 = 128,130.19/x - Step 3: Cross multiply
87,121.13x = 128,130.19 × 128,130.19 - Step 4: Simplify right side
87,121.13x = 16,417,344,948.79 - Step 5: Solve for x
x = 16,417,344,948.79/87,121.13 - Step 6: Final answer
x = 188,442.76
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Why These Related Problems?
These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.