Finding the Fourth Proportional to 128,454.22, 177,326.34 and 74,719.66
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Solution
The fourth proportional to 128,454.22, 177,326.34 and 74,719.66 is: 103,147.75
Step by Step Solution
- Step 1: Write the proportion equation
128,454.22 : 177,326.34 = 74,719.66 : x - Step 2: Convert to fraction form
128,454.22/177,326.34 = 74,719.66/x - Step 3: Cross multiply
128,454.22x = 177,326.34 × 74,719.66 - Step 4: Simplify right side
128,454.22x = 13,249,763,833.84 - Step 5: Solve for x
x = 13,249,763,833.84/128,454.22 - Step 6: Final answer
x = 103,147.75
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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.