Finding the Fourth Proportional to 128,862.38, 177,907.85 and 84,228.14
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Solution
The fourth proportional to 128,862.38, 177,907.85 and 84,228.14 is: 116,285.66
Step by Step Solution
- Step 1: Write the proportion equation
128,862.38 : 177,907.85 = 84,228.14 : x - Step 2: Convert to fraction form
128,862.38/177,907.85 = 84,228.14/x - Step 3: Cross multiply
128,862.38x = 177,907.85 × 84,228.14 - Step 4: Simplify right side
128,862.38x = 14,984,845,986.22 - Step 5: Solve for x
x = 14,984,845,986.22/128,862.38 - Step 6: Final answer
x = 116,285.66
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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.