Finding the Fourth Proportional to 128,461.01, 177,233.27 and 74,734.65
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Solution
The fourth proportional to 128,461.01, 177,233.27 and 74,734.65 is: 103,108.85
Step by Step Solution
- Step 1: Write the proportion equation
128,461.01 : 177,233.27 = 74,734.65 : x - Step 2: Convert to fraction form
128,461.01/177,233.27 = 74,734.65/x - Step 3: Cross multiply
128,461.01x = 177,233.27 × 74,734.65 - Step 4: Simplify right side
128,461.01x = 13,245,466,028.13 - Step 5: Solve for x
x = 13,245,466,028.13/128,461.01 - Step 6: Final answer
x = 103,108.85
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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.