Finding the Fourth Proportional to 128,438.22, 177,304.23 and 74,703.63
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Solution
The fourth proportional to 128,438.22, 177,304.23 and 74,703.63 is: 103,125.61
Step by Step Solution
- Step 1: Write the proportion equation
128,438.22 : 177,304.23 = 74,703.63 : x - Step 2: Convert to fraction form
128,438.22/177,304.23 = 74,703.63/x - Step 3: Cross multiply
128,438.22x = 177,304.23 × 74,703.63 - Step 4: Simplify right side
128,438.22x = 13,245,269,595.35 - Step 5: Solve for x
x = 13,245,269,595.35/128,438.22 - Step 6: Final answer
x = 103,125.61
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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.