Finding the Fourth Proportional to 136,905.70, 205,488.15 and 84,417.70
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Solution
The fourth proportional to 136,905.70, 205,488.15 and 84,417.70 is: 126,706.46
Step by Step Solution
- Step 1: Write the proportion equation
136,905.70 : 205,488.15 = 84,417.70 : x - Step 2: Convert to fraction form
136,905.70/205,488.15 = 84,417.70/x - Step 3: Cross multiply
136,905.70x = 205,488.15 × 84,417.70 - Step 4: Simplify right side
136,905.70x = 17,346,837,000.26 - Step 5: Solve for x
x = 17,346,837,000.26/136,905.70 - Step 6: Final answer
x = 126,706.46
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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.