Finding the Fourth Proportional to 138,648.99, 191,335.60 and 74,986.79
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Solution
The fourth proportional to 138,648.99, 191,335.60 and 74,986.79 is: 103,481.76
Step by Step Solution
- Step 1: Write the proportion equation
138,648.99 : 191,335.60 = 74,986.79 : x - Step 2: Convert to fraction form
138,648.99/191,335.60 = 74,986.79/x - Step 3: Cross multiply
138,648.99x = 191,335.60 × 74,986.79 - Step 4: Simplify right side
138,648.99x = 14,347,641,312.58 - Step 5: Solve for x
x = 14,347,641,312.58/138,648.99 - Step 6: Final answer
x = 103,481.76
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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.