Finding the Fourth Proportional to 128,265.84, 177,006.78 and 71,677.08
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Solution
The fourth proportional to 128,265.84, 177,006.78 and 71,677.08 is: 98,914.33
Step by Step Solution
- Step 1: Write the proportion equation
128,265.84 : 177,006.78 = 71,677.08 : x - Step 2: Convert to fraction form
128,265.84/177,006.78 = 71,677.08/x - Step 3: Cross multiply
128,265.84x = 177,006.78 × 71,677.08 - Step 4: Simplify right side
128,265.84x = 12,687,329,130.60 - Step 5: Solve for x
x = 12,687,329,130.60/128,265.84 - Step 6: Final answer
x = 98,914.33
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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.