Finding the Fourth Proportional to 77,817.89, 107,387.22 and 47,600.99
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Solution
The fourth proportional to 77,817.89, 107,387.22 and 47,600.99 is: 65,688.47
Step by Step Solution
- Step 1: Write the proportion equation
77,817.89 : 107,387.22 = 47,600.99 : x - Step 2: Convert to fraction form
77,817.89/107,387.22 = 47,600.99/x - Step 3: Cross multiply
77,817.89x = 107,387.22 × 47,600.99 - Step 4: Simplify right side
77,817.89x = 5,111,737,985.35 - Step 5: Solve for x
x = 5,111,737,985.35/77,817.89 - Step 6: Final answer
x = 65,688.47
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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.