Finding the Fourth Proportional to 90,985.36, 125,569.14 and 54,698.55
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Solution
The fourth proportional to 90,985.36, 125,569.14 and 54,698.55 is: 75,489.62
Step by Step Solution
- Step 1: Write the proportion equation
90,985.36 : 125,569.14 = 54,698.55 : x - Step 2: Convert to fraction form
90,985.36/125,569.14 = 54,698.55/x - Step 3: Cross multiply
90,985.36x = 125,569.14 × 54,698.55 - Step 4: Simplify right side
90,985.36x = 6,868,449,882.75 - Step 5: Solve for x
x = 6,868,449,882.75/90,985.36 - Step 6: Final answer
x = 75,489.62
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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.