Finding the Fourth Proportional to 128,717.80, 193,076.70 and 73,421.80
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Solution
The fourth proportional to 128,717.80, 193,076.70 and 73,421.80 is: 110,132.70
Step by Step Solution
- Step 1: Write the proportion equation
128,717.80 : 193,076.70 = 73,421.80 : x - Step 2: Convert to fraction form
128,717.80/193,076.70 = 73,421.80/x - Step 3: Cross multiply
128,717.80x = 193,076.70 × 73,421.80 - Step 4: Simplify right side
128,717.80x = 14,176,038,852.06 - Step 5: Solve for x
x = 14,176,038,852.06/128,717.80 - Step 6: Final answer
x = 110,132.70
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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.