Finding the Fourth Proportional to 135,159.90, 186,506.39 and 74,720.79
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Solution
The fourth proportional to 135,159.90, 186,506.39 and 74,720.79 is: 103,106.80
Step by Step Solution
- Step 1: Write the proportion equation
135,159.90 : 186,506.39 = 74,720.79 : x - Step 2: Convert to fraction form
135,159.90/186,506.39 = 74,720.79/x - Step 3: Cross multiply
135,159.90x = 186,506.39 × 74,720.79 - Step 4: Simplify right side
135,159.90x = 13,935,904,427.24 - Step 5: Solve for x
x = 13,935,904,427.24/135,159.90 - Step 6: Final answer
x = 103,106.80
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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.