Finding the Fourth Proportional to 100,726.07, 138,999.08 and 55,404.05
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Solution
The fourth proportional to 100,726.07, 138,999.08 and 55,404.05 is: 76,455.99
Step by Step Solution
- Step 1: Write the proportion equation
100,726.07 : 138,999.08 = 55,404.05 : x - Step 2: Convert to fraction form
100,726.07/138,999.08 = 55,404.05/x - Step 3: Cross multiply
100,726.07x = 138,999.08 × 55,404.05 - Step 4: Simplify right side
100,726.07x = 7,701,111,701.25 - Step 5: Solve for x
x = 7,701,111,701.25/100,726.07 - Step 6: Final answer
x = 76,455.99
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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.