Finding the Fourth Proportional to 128,484.71, 177,313.74 and 71,896.49
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Solution
The fourth proportional to 128,484.71, 177,313.74 and 71,896.49 is: 99,219.86
Step by Step Solution
- Step 1: Write the proportion equation
128,484.71 : 177,313.74 = 71,896.49 : x - Step 2: Convert to fraction form
128,484.71/177,313.74 = 71,896.49/x - Step 3: Cross multiply
128,484.71x = 177,313.74 × 71,896.49 - Step 4: Simplify right side
128,484.71x = 12,748,235,534.77 - Step 5: Solve for x
x = 12,748,235,534.77/128,484.71 - Step 6: Final answer
x = 99,219.86
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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.