Finding the Fourth Proportional to 128,765.58, 193,203.86 and 69,642.87
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Solution
The fourth proportional to 128,765.58, 193,203.86 and 69,642.87 is: 104,494.31
Step by Step Solution
- Step 1: Write the proportion equation
128,765.58 : 193,203.86 = 69,642.87 : x - Step 2: Convert to fraction form
128,765.58/193,203.86 = 69,642.87/x - Step 3: Cross multiply
128,765.58x = 193,203.86 × 69,642.87 - Step 4: Simplify right side
128,765.58x = 13,455,270,957.26 - Step 5: Solve for x
x = 13,455,270,957.26/128,765.58 - Step 6: Final answer
x = 104,494.31
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.