Finding the Fourth Proportional to 128,017.94, 176,608.50 and 122,088.74
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Solution
The fourth proportional to 128,017.94, 176,608.50 and 122,088.74 is: 168,428.81
Step by Step Solution
- Step 1: Write the proportion equation
128,017.94 : 176,608.50 = 122,088.74 : x - Step 2: Convert to fraction form
128,017.94/176,608.50 = 122,088.74/x - Step 3: Cross multiply
128,017.94x = 176,608.50 × 122,088.74 - Step 4: Simplify right side
128,017.94x = 21,561,909,238.29 - Step 5: Solve for x
x = 21,561,909,238.29/128,017.94 - Step 6: Final answer
x = 168,428.81
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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.