Finding the Fourth Proportional to 128,090.13, 176,761.35 and 74,373.63
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Solution
The fourth proportional to 128,090.13, 176,761.35 and 74,373.63 is: 102,633.85
Step by Step Solution
- Step 1: Write the proportion equation
128,090.13 : 176,761.35 = 74,373.63 : x - Step 2: Convert to fraction form
128,090.13/176,761.35 = 74,373.63/x - Step 3: Cross multiply
128,090.13x = 176,761.35 × 74,373.63 - Step 4: Simplify right side
128,090.13x = 13,146,383,243.20 - Step 5: Solve for x
x = 13,146,383,243.20/128,090.13 - Step 6: Final answer
x = 102,633.85
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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.