Finding the Fourth Proportional to 121,830.78, 168,128.55 and 68,110.02
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Solution
The fourth proportional to 121,830.78, 168,128.55 and 68,110.02 is: 93,992.99
Step by Step Solution
- Step 1: Write the proportion equation
121,830.78 : 168,128.55 = 68,110.02 : x - Step 2: Convert to fraction form
121,830.78/168,128.55 = 68,110.02/x - Step 3: Cross multiply
121,830.78x = 168,128.55 × 68,110.02 - Step 4: Simplify right side
121,830.78x = 11,451,238,903.07 - Step 5: Solve for x
x = 11,451,238,903.07/121,830.78 - Step 6: Final answer
x = 93,992.99
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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.