Finding the Fourth Proportional to 128,660.96, 192,989.60 and 57,564.80
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Solution
The fourth proportional to 128,660.96, 192,989.60 and 57,564.80 is: 86,346.38
Step by Step Solution
- Step 1: Write the proportion equation
128,660.96 : 192,989.60 = 57,564.80 : x - Step 2: Convert to fraction form
128,660.96/192,989.60 = 57,564.80/x - Step 3: Cross multiply
128,660.96x = 192,989.60 × 57,564.80 - Step 4: Simplify right side
128,660.96x = 11,109,407,726.08 - Step 5: Solve for x
x = 11,109,407,726.08/128,660.96 - Step 6: Final answer
x = 86,346.38
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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.