Finding the Fourth Proportional to 77,916.49, 107,499.49 and 47,670.28
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Solution
The fourth proportional to 77,916.49, 107,499.49 and 47,670.28 is: 65,769.53
Step by Step Solution
- Step 1: Write the proportion equation
77,916.49 : 107,499.49 = 47,670.28 : x - Step 2: Convert to fraction form
77,916.49/107,499.49 = 47,670.28/x - Step 3: Cross multiply
77,916.49x = 107,499.49 × 47,670.28 - Step 4: Simplify right side
77,916.49x = 5,124,530,400.23 - Step 5: Solve for x
x = 5,124,530,400.23/77,916.49 - Step 6: Final answer
x = 65,769.53
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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.