Finding the Fourth Proportional to 128,395.44, 177,255.36 and 77,417.28
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Solution
The fourth proportional to 128,395.44, 177,255.36 and 77,417.28 is: 106,877.84
Step by Step Solution
- Step 1: Write the proportion equation
128,395.44 : 177,255.36 = 77,417.28 : x - Step 2: Convert to fraction form
128,395.44/177,255.36 = 77,417.28/x - Step 3: Cross multiply
128,395.44x = 177,255.36 × 77,417.28 - Step 4: Simplify right side
128,395.44x = 13,722,627,836.62 - Step 5: Solve for x
x = 13,722,627,836.62/128,395.44 - Step 6: Final answer
x = 106,877.84
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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.