Finding the Fourth Proportional to 100,948.68, 139,214.70 and 79,778.52
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Solution
The fourth proportional to 100,948.68, 139,214.70 and 79,778.52 is: 110,019.69
Step by Step Solution
- Step 1: Write the proportion equation
100,948.68 : 139,214.70 = 79,778.52 : x - Step 2: Convert to fraction form
100,948.68/139,214.70 = 79,778.52/x - Step 3: Cross multiply
100,948.68x = 139,214.70 × 79,778.52 - Step 4: Simplify right side
100,948.68x = 11,106,342,728.24 - Step 5: Solve for x
x = 11,106,342,728.24/100,948.68 - Step 6: Final answer
x = 110,019.69
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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.