Finding the Fourth Proportional to 87,972.21, 121,238.84 and 62,479.69
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Solution
The fourth proportional to 87,972.21, 121,238.84 and 62,479.69 is: 86,106.34
Step by Step Solution
- Step 1: Write the proportion equation
87,972.21 : 121,238.84 = 62,479.69 : x - Step 2: Convert to fraction form
87,972.21/121,238.84 = 62,479.69/x - Step 3: Cross multiply
87,972.21x = 121,238.84 × 62,479.69 - Step 4: Simplify right side
87,972.21x = 7,574,964,992.26 - Step 5: Solve for x
x = 7,574,964,992.26/87,972.21 - Step 6: Final answer
x = 86,106.34
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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.