Finding the Fourth Proportional to 138,407.73, 191,002.65 and 74,745.53
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Solution
The fourth proportional to 138,407.73, 191,002.65 and 74,745.53 is: 103,148.82
Step by Step Solution
- Step 1: Write the proportion equation
138,407.73 : 191,002.65 = 74,745.53 : x - Step 2: Convert to fraction form
138,407.73/191,002.65 = 74,745.53/x - Step 3: Cross multiply
138,407.73x = 191,002.65 × 74,745.53 - Step 4: Simplify right side
138,407.73x = 14,276,594,020.20 - Step 5: Solve for x
x = 14,276,594,020.20/138,407.73 - Step 6: Final answer
x = 103,148.82
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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.