Finding the Fourth Proportional to 128,799.36, 192,948.86 and 72,467.70
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Solution
The fourth proportional to 128,799.36, 192,948.86 and 72,467.70 is: 108,560.79
Step by Step Solution
- Step 1: Write the proportion equation
128,799.36 : 192,948.86 = 72,467.70 : x - Step 2: Convert to fraction form
128,799.36/192,948.86 = 72,467.70/x - Step 3: Cross multiply
128,799.36x = 192,948.86 × 72,467.70 - Step 4: Simplify right side
128,799.36x = 13,982,559,739.48 - Step 5: Solve for x
x = 13,982,559,739.48/128,799.36 - Step 6: Final answer
x = 108,560.79
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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.