Finding the Fourth Proportional to 128,512.30, 177,346.95 and 71,923.68
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Solution
The fourth proportional to 128,512.30, 177,346.95 and 71,923.68 is: 99,254.66
Step by Step Solution
- Step 1: Write the proportion equation
128,512.30 : 177,346.95 = 71,923.68 : x - Step 2: Convert to fraction form
128,512.30/177,346.95 = 71,923.68/x - Step 3: Cross multiply
128,512.30x = 177,346.95 × 71,923.68 - Step 4: Simplify right side
128,512.30x = 12,755,444,394.04 - Step 5: Solve for x
x = 12,755,444,394.04/128,512.30 - Step 6: Final answer
x = 99,254.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.