Finding the Fourth Proportional to 155,698.84, 214,865.06 and 87,716.63
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Solution
The fourth proportional to 155,698.84, 214,865.06 and 87,716.63 is: 121,049.32
Step by Step Solution
- Step 1: Write the proportion equation
155,698.84 : 214,865.06 = 87,716.63 : x - Step 2: Convert to fraction form
155,698.84/214,865.06 = 87,716.63/x - Step 3: Cross multiply
155,698.84x = 214,865.06 × 87,716.63 - Step 4: Simplify right side
155,698.84x = 18,847,238,967.95 - Step 5: Solve for x
x = 18,847,238,967.95/155,698.84 - Step 6: Final answer
x = 121,049.32
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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.