Finding the Fourth Proportional to 68,864.52, 103,283.18 and 18,931.74
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Solution
The fourth proportional to 68,864.52, 103,283.18 and 18,931.74 is: 28,393.87
Step by Step Solution
- Step 1: Write the proportion equation
68,864.52 : 103,283.18 = 18,931.74 : x - Step 2: Convert to fraction form
68,864.52/103,283.18 = 18,931.74/x - Step 3: Cross multiply
68,864.52x = 103,283.18 × 18,931.74 - Step 4: Simplify right side
68,864.52x = 1,955,330,310.13 - Step 5: Solve for x
x = 1,955,330,310.13/68,864.52 - Step 6: Final answer
x = 28,393.87
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.