Finding the Fourth Proportional to 112,357.20, 155,115.21 and 76,599.75
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Solution
The fourth proportional to 112,357.20, 155,115.21 and 76,599.75 is: 105,750.11
Step by Step Solution
- Step 1: Write the proportion equation
112,357.20 : 155,115.21 = 76,599.75 : x - Step 2: Convert to fraction form
112,357.20/155,115.21 = 76,599.75/x - Step 3: Cross multiply
112,357.20x = 155,115.21 × 76,599.75 - Step 4: Simplify right side
112,357.20x = 11,881,786,307.20 - Step 5: Solve for x
x = 11,881,786,307.20/112,357.20 - Step 6: Final answer
x = 105,750.11
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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.