Finding the Fourth Proportional to 77,731.53, 115,991.07 and 69,353.97
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Solution
The fourth proportional to 77,731.53, 115,991.07 and 69,353.97 is: 103,490.07
Step by Step Solution
- Step 1: Write the proportion equation
77,731.53 : 115,991.07 = 69,353.97 : x - Step 2: Convert to fraction form
77,731.53/115,991.07 = 69,353.97/x - Step 3: Cross multiply
77,731.53x = 115,991.07 × 69,353.97 - Step 4: Simplify right side
77,731.53x = 8,044,441,189.05 - Step 5: Solve for x
x = 8,044,441,189.05/77,731.53 - Step 6: Final answer
x = 103,490.07
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.