Finding the Fourth Proportional to 135,416.42, 186,872.36 and 74,985.75
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Solution
The fourth proportional to 135,416.42, 186,872.36 and 74,985.75 is: 103,479.06
Step by Step Solution
- Step 1: Write the proportion equation
135,416.42 : 186,872.36 = 74,985.75 : x - Step 2: Convert to fraction form
135,416.42/186,872.36 = 74,985.75/x - Step 3: Cross multiply
135,416.42x = 186,872.36 × 74,985.75 - Step 4: Simplify right side
135,416.42x = 14,012,763,693.94 - Step 5: Solve for x
x = 14,012,763,693.94/135,416.42 - Step 6: Final answer
x = 103,479.06
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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.