Finding the Fourth Proportional to 75,128.22, 103,679.74 and 42,868.09
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Solution
The fourth proportional to 75,128.22, 103,679.74 and 42,868.09 is: 59,159.56
Step by Step Solution
- Step 1: Write the proportion equation
75,128.22 : 103,679.74 = 42,868.09 : x - Step 2: Convert to fraction form
75,128.22/103,679.74 = 42,868.09/x - Step 3: Cross multiply
75,128.22x = 103,679.74 × 42,868.09 - Step 4: Simplify right side
75,128.22x = 4,444,552,447.93 - Step 5: Solve for x
x = 4,444,552,447.93/75,128.22 - Step 6: Final answer
x = 59,159.56
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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.