Finding the Fourth Proportional to 128,265.93, 177,005.68 and 71,677.31
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Solution
The fourth proportional to 128,265.93, 177,005.68 and 71,677.31 is: 98,913.95
Step by Step Solution
- Step 1: Write the proportion equation
128,265.93 : 177,005.68 = 71,677.31 : x - Step 2: Convert to fraction form
128,265.93/177,005.68 = 71,677.31/x - Step 3: Cross multiply
128,265.93x = 177,005.68 × 71,677.31 - Step 4: Simplify right side
128,265.93x = 12,687,289,932.90 - Step 5: Solve for x
x = 12,687,289,932.90/128,265.93 - Step 6: Final answer
x = 98,913.95
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1.5x scale
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.