Finding the Fourth Proportional to 112,645.40, 168,781.50 and 79,202.07
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Solution
The fourth proportional to 112,645.40, 168,781.50 and 79,202.07 is: 118,671.90
Step by Step Solution
- Step 1: Write the proportion equation
112,645.40 : 168,781.50 = 79,202.07 : x - Step 2: Convert to fraction form
112,645.40/168,781.50 = 79,202.07/x - Step 3: Cross multiply
112,645.40x = 168,781.50 × 79,202.07 - Step 4: Simplify right side
112,645.40x = 13,367,843,544.77 - Step 5: Solve for x
x = 13,367,843,544.77/112,645.40 - Step 6: Final answer
x = 118,671.90
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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.