Finding the Fourth Proportional to 87,831.18, 131,877.99 and 86,518.98
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Solution
The fourth proportional to 87,831.18, 131,877.99 and 86,518.98 is: 129,907.73
Step by Step Solution
- Step 1: Write the proportion equation
87,831.18 : 131,877.99 = 86,518.98 : x - Step 2: Convert to fraction form
87,831.18/131,877.99 = 86,518.98/x - Step 3: Cross multiply
87,831.18x = 131,877.99 × 86,518.98 - Step 4: Simplify right side
87,831.18x = 11,409,949,179.25 - Step 5: Solve for x
x = 11,409,949,179.25/87,831.18 - Step 6: Final answer
x = 129,907.73
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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.