Finding the Fourth Proportional to 128,128.05, 192,233.16 and 61,572.99
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Solution
The fourth proportional to 128,128.05, 192,233.16 and 61,572.99 is: 92,379.23
Step by Step Solution
- Step 1: Write the proportion equation
128,128.05 : 192,233.16 = 61,572.99 : x - Step 2: Convert to fraction form
128,128.05/192,233.16 = 61,572.99/x - Step 3: Cross multiply
128,128.05x = 192,233.16 × 61,572.99 - Step 4: Simplify right side
128,128.05x = 11,836,370,438.35 - Step 5: Solve for x
x = 11,836,370,438.35/128,128.05 - Step 6: Final answer
x = 92,379.23
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1.5x scale
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.