Finding the Fourth Proportional to 77,999.02, 107,638.73 and 42,189.09
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Solution
The fourth proportional to 77,999.02, 107,638.73 and 42,189.09 is: 58,220.99
Step by Step Solution
- Step 1: Write the proportion equation
77,999.02 : 107,638.73 = 42,189.09 : x - Step 2: Convert to fraction form
77,999.02/107,638.73 = 42,189.09/x - Step 3: Cross multiply
77,999.02x = 107,638.73 × 42,189.09 - Step 4: Simplify right side
77,999.02x = 4,541,180,067.46 - Step 5: Solve for x
x = 4,541,180,067.46/77,999.02 - Step 6: Final answer
x = 58,220.99
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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.