Finding the Fourth Proportional to 122,393.72, 168,958.16 and 74,666.09
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Solution
The fourth proportional to 122,393.72, 168,958.16 and 74,666.09 is: 103,072.65
Step by Step Solution
- Step 1: Write the proportion equation
122,393.72 : 168,958.16 = 74,666.09 : x - Step 2: Convert to fraction form
122,393.72/168,958.16 = 74,666.09/x - Step 3: Cross multiply
122,393.72x = 168,958.16 × 74,666.09 - Step 4: Simplify right side
122,393.72x = 12,615,443,962.67 - Step 5: Solve for x
x = 12,615,443,962.67/122,393.72 - Step 6: Final answer
x = 103,072.65
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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.