Finding the Fourth Proportional to 128,770.71, 193,209.21 and 69,536.63
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Solution
The fourth proportional to 128,770.71, 193,209.21 and 69,536.63 is: 104,333.64
Step by Step Solution
- Step 1: Write the proportion equation
128,770.71 : 193,209.21 = 69,536.63 : x - Step 2: Convert to fraction form
128,770.71/193,209.21 = 69,536.63/x - Step 3: Cross multiply
128,770.71x = 193,209.21 × 69,536.63 - Step 4: Simplify right side
128,770.71x = 13,435,117,348.36 - Step 5: Solve for x
x = 13,435,117,348.36/128,770.71 - Step 6: Final answer
x = 104,333.64
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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.