Finding the Fourth Proportional to 128,878.77, 193,459.56 and 102,394.98
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Solution
The fourth proportional to 128,878.77, 193,459.56 and 102,394.98 is: 153,704.82
Step by Step Solution
- Step 1: Write the proportion equation
128,878.77 : 193,459.56 = 102,394.98 : x - Step 2: Convert to fraction form
128,878.77/193,459.56 = 102,394.98/x - Step 3: Cross multiply
128,878.77x = 193,459.56 × 102,394.98 - Step 4: Simplify right side
128,878.77x = 19,809,287,777.01 - Step 5: Solve for x
x = 19,809,287,777.01/128,878.77 - Step 6: Final answer
x = 153,704.82
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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.