Finding the Fourth Proportional to 112,688.09, 168,782.99 and 77,064.99
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Solution
The fourth proportional to 112,688.09, 168,782.99 and 77,064.99 is: 115,427.09
Step by Step Solution
- Step 1: Write the proportion equation
112,688.09 : 168,782.99 = 77,064.99 : x - Step 2: Convert to fraction form
112,688.09/168,782.99 = 77,064.99/x - Step 3: Cross multiply
112,688.09x = 168,782.99 × 77,064.99 - Step 4: Simplify right side
112,688.09x = 13,007,259,051.20 - Step 5: Solve for x
x = 13,007,259,051.20/112,688.09 - Step 6: Final answer
x = 115,427.09
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.