Finding the Fourth Proportional to 103,105.05, 142,353.51 and 79,188.99
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Solution
The fourth proportional to 103,105.05, 142,353.51 and 79,188.99 is: 109,333.45
Step by Step Solution
- Step 1: Write the proportion equation
103,105.05 : 142,353.51 = 79,188.99 : x - Step 2: Convert to fraction form
103,105.05/142,353.51 = 79,188.99/x - Step 3: Cross multiply
103,105.05x = 142,353.51 × 79,188.99 - Step 4: Simplify right side
103,105.05x = 11,272,830,679.85 - Step 5: Solve for x
x = 11,272,830,679.85/103,105.05 - Step 6: Final answer
x = 109,333.45
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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.