Finding the Fourth Proportional to 128,146.56, 176,852.16 and 74,448.96
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Solution
The fourth proportional to 128,146.56, 176,852.16 and 74,448.96 is: 102,745.32
Step by Step Solution
- Step 1: Write the proportion equation
128,146.56 : 176,852.16 = 74,448.96 : x - Step 2: Convert to fraction form
128,146.56/176,852.16 = 74,448.96/x - Step 3: Cross multiply
128,146.56x = 176,852.16 × 74,448.96 - Step 4: Simplify right side
128,146.56x = 13,166,459,385.75 - Step 5: Solve for x
x = 13,166,459,385.75/128,146.56 - Step 6: Final answer
x = 102,745.32
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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.