Finding the Fourth Proportional to 155,421.74, 214,489.88 and 91,758.17
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Solution
The fourth proportional to 155,421.74, 214,489.88 and 91,758.17 is: 126,630.92
Step by Step Solution
- Step 1: Write the proportion equation
155,421.74 : 214,489.88 = 91,758.17 : x - Step 2: Convert to fraction form
155,421.74/214,489.88 = 91,758.17/x - Step 3: Cross multiply
155,421.74x = 214,489.88 × 91,758.17 - Step 4: Simplify right side
155,421.74x = 19,681,197,341.08 - Step 5: Solve for x
x = 19,681,197,341.08/155,421.74 - Step 6: Final answer
x = 126,630.92
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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.