Finding the Fourth Proportional to 128,365.40, 192,580.54 and 103,630.20
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Solution
The fourth proportional to 128,365.40, 192,580.54 and 103,630.20 is: 155,471.49
Step by Step Solution
- Step 1: Write the proportion equation
128,365.40 : 192,580.54 = 103,630.20 : x - Step 2: Convert to fraction form
128,365.40/192,580.54 = 103,630.20/x - Step 3: Cross multiply
128,365.40x = 192,580.54 × 103,630.20 - Step 4: Simplify right side
128,365.40x = 19,957,159,876.31 - Step 5: Solve for x
x = 19,957,159,876.31/128,365.40 - Step 6: Final answer
x = 155,471.49
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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.