Finding the Fourth Proportional to 105,272.55, 145,279.71 and 57,528.99
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Solution
The fourth proportional to 105,272.55, 145,279.71 and 57,528.99 is: 79,391.97
Step by Step Solution
- Step 1: Write the proportion equation
105,272.55 : 145,279.71 = 57,528.99 : x - Step 2: Convert to fraction form
105,272.55/145,279.71 = 57,528.99/x - Step 3: Cross multiply
105,272.55x = 145,279.71 × 57,528.99 - Step 4: Simplify right side
105,272.55x = 8,357,794,983.79 - Step 5: Solve for x
x = 8,357,794,983.79/105,272.55 - Step 6: Final answer
x = 79,391.97
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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.