Finding the Fourth Proportional to 100,317.69, 138,415.65 and 68,056.70
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Solution
The fourth proportional to 100,317.69, 138,415.65 and 68,056.70 is: 93,902.80
Step by Step Solution
- Step 1: Write the proportion equation
100,317.69 : 138,415.65 = 68,056.70 : x - Step 2: Convert to fraction form
100,317.69/138,415.65 = 68,056.70/x - Step 3: Cross multiply
100,317.69x = 138,415.65 × 68,056.70 - Step 4: Simplify right side
100,317.69x = 9,420,111,675.28 - Step 5: Solve for x
x = 9,420,111,675.28/100,317.69 - Step 6: Final answer
x = 93,902.80
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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.