Finding the Fourth Proportional to 122,354.74, 168,921.93 and 77,071.54
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Solution
The fourth proportional to 122,354.74, 168,921.93 and 77,071.54 is: 106,404.32
Step by Step Solution
- Step 1: Write the proportion equation
122,354.74 : 168,921.93 = 77,071.54 : x - Step 2: Convert to fraction form
122,354.74/168,921.93 = 77,071.54/x - Step 3: Cross multiply
122,354.74x = 168,921.93 × 77,071.54 - Step 4: Simplify right side
122,354.74x = 13,019,073,284.87 - Step 5: Solve for x
x = 13,019,073,284.87/122,354.74 - Step 6: Final answer
x = 106,404.32
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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.