Finding the Fourth Proportional to 87,938.62, 121,309.40 and 53,954.69
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Solution
The fourth proportional to 87,938.62, 121,309.40 and 53,954.69 is: 74,429.31
Step by Step Solution
- Step 1: Write the proportion equation
87,938.62 : 121,309.40 = 53,954.69 : x - Step 2: Convert to fraction form
87,938.62/121,309.40 = 53,954.69/x - Step 3: Cross multiply
87,938.62x = 121,309.40 × 53,954.69 - Step 4: Simplify right side
87,938.62x = 6,545,211,490.07 - Step 5: Solve for x
x = 6,545,211,490.07/87,938.62 - Step 6: Final answer
x = 74,429.31
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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.