Finding the Fourth Proportional to 100,135.09, 138,186.71 and 55,423.09
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Solution
The fourth proportional to 100,135.09, 138,186.71 and 55,423.09 is: 76,484.02
Step by Step Solution
- Step 1: Write the proportion equation
100,135.09 : 138,186.71 = 55,423.09 : x - Step 2: Convert to fraction form
100,135.09/138,186.71 = 55,423.09/x - Step 3: Cross multiply
100,135.09x = 138,186.71 × 55,423.09 - Step 4: Simplify right side
100,135.09x = 7,658,734,465.13 - Step 5: Solve for x
x = 7,658,734,465.13/100,135.09 - Step 6: Final answer
x = 76,484.02
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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.