Finding the Fourth Proportional to 128,895.58, 193,419.92 and 69,729.94
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Solution
The fourth proportional to 128,895.58, 193,419.92 and 69,729.94 is: 104,636.32
Step by Step Solution
- Step 1: Write the proportion equation
128,895.58 : 193,419.92 = 69,729.94 : x - Step 2: Convert to fraction form
128,895.58/193,419.92 = 69,729.94/x - Step 3: Cross multiply
128,895.58x = 193,419.92 × 69,729.94 - Step 4: Simplify right side
128,895.58x = 13,487,159,416.40 - Step 5: Solve for x
x = 13,487,159,416.40/128,895.58 - Step 6: Final answer
x = 104,636.32
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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.