Finding the Fourth Proportional to 128,671.40, 177,523.99 and 77,664.76
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Solution
The fourth proportional to 128,671.40, 177,523.99 and 77,664.76 is: 107,151.69
Step by Step Solution
- Step 1: Write the proportion equation
128,671.40 : 177,523.99 = 77,664.76 : x - Step 2: Convert to fraction form
128,671.40/177,523.99 = 77,664.76/x - Step 3: Cross multiply
128,671.40x = 177,523.99 × 77,664.76 - Step 4: Simplify right side
128,671.40x = 13,787,358,077.59 - Step 5: Solve for x
x = 13,787,358,077.59/128,671.40 - Step 6: Final answer
x = 107,151.69
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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.