Finding the Fourth Proportional to 128,601.72, 177,470.35 and 71,244.77
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Solution
The fourth proportional to 128,601.72, 177,470.35 and 71,244.77 is: 98,317.77
Step by Step Solution
- Step 1: Write the proportion equation
128,601.72 : 177,470.35 = 71,244.77 : x - Step 2: Convert to fraction form
128,601.72/177,470.35 = 71,244.77/x - Step 3: Cross multiply
128,601.72x = 177,470.35 × 71,244.77 - Step 4: Simplify right side
128,601.72x = 12,643,834,533.13 - Step 5: Solve for x
x = 12,643,834,533.13/128,601.72 - Step 6: Final answer
x = 98,317.77
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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.