Finding the Fourth Proportional to 87,831.14, 121,207.19 and 47,545.38
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Solution
The fourth proportional to 87,831.14, 121,207.19 and 47,545.38 is: 65,612.74
Step by Step Solution
- Step 1: Write the proportion equation
87,831.14 : 121,207.19 = 47,545.38 : x - Step 2: Convert to fraction form
87,831.14/121,207.19 = 47,545.38/x - Step 3: Cross multiply
87,831.14x = 121,207.19 × 47,545.38 - Step 4: Simplify right side
87,831.14x = 5,762,841,669.56 - Step 5: Solve for x
x = 5,762,841,669.56/87,831.14 - Step 6: Final answer
x = 65,612.74
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.