Finding the Fourth Proportional to 99,207.80, 136,831.74 and 68,977.98
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Solution
The fourth proportional to 99,207.80, 136,831.74 and 68,977.98 is: 95,137.45
Step by Step Solution
- Step 1: Write the proportion equation
99,207.80 : 136,831.74 = 68,977.98 : x - Step 2: Convert to fraction form
99,207.80/136,831.74 = 68,977.98/x - Step 3: Cross multiply
99,207.80x = 136,831.74 × 68,977.98 - Step 4: Simplify right side
99,207.80x = 9,438,377,025.09 - Step 5: Solve for x
x = 9,438,377,025.09/99,207.80 - Step 6: Final answer
x = 95,137.45
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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.