Finding the Fourth Proportional to 128,259.87, 176,998.17 and 71,671.26
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Solution
The fourth proportional to 128,259.87, 176,998.17 and 71,671.26 is: 98,906.09
Step by Step Solution
- Step 1: Write the proportion equation
128,259.87 : 176,998.17 = 71,671.26 : x - Step 2: Convert to fraction form
128,259.87/176,998.17 = 71,671.26/x - Step 3: Cross multiply
128,259.87x = 176,998.17 × 71,671.26 - Step 4: Simplify right side
128,259.87x = 12,685,681,861.59 - Step 5: Solve for x
x = 12,685,681,861.59/128,259.87 - Step 6: Final answer
x = 98,906.09
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1.5x scale
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.