Finding the Fourth Proportional to 128,417.67, 177,385.74 and 98,571.81
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Solution
The fourth proportional to 128,417.67, 177,385.74 and 98,571.81 is: 136,159.09
Step by Step Solution
- Step 1: Write the proportion equation
128,417.67 : 177,385.74 = 98,571.81 : x - Step 2: Convert to fraction form
128,417.67/177,385.74 = 98,571.81/x - Step 3: Cross multiply
128,417.67x = 177,385.74 × 98,571.81 - Step 4: Simplify right side
128,417.67x = 17,485,233,459.99 - Step 5: Solve for x
x = 17,485,233,459.99/128,417.67 - Step 6: Final answer
x = 136,159.09
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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.