Finding the Fourth Proportional to 128,498.96, 177,347.12 and 74,040.70
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Solution
The fourth proportional to 128,498.96, 177,347.12 and 74,040.70 is: 102,186.86
Step by Step Solution
- Step 1: Write the proportion equation
128,498.96 : 177,347.12 = 74,040.70 : x - Step 2: Convert to fraction form
128,498.96/177,347.12 = 74,040.70/x - Step 3: Cross multiply
128,498.96x = 177,347.12 × 74,040.70 - Step 4: Simplify right side
128,498.96x = 13,130,904,094.21 - Step 5: Solve for x
x = 13,130,904,094.21/128,498.96 - Step 6: Final answer
x = 102,186.86
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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.