Finding the Fourth Proportional to 90,768.74, 136,135.11 and 86,267.94
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Solution
The fourth proportional to 90,768.74, 136,135.11 and 86,267.94 is: 129,384.80
Step by Step Solution
- Step 1: Write the proportion equation
90,768.74 : 136,135.11 = 86,267.94 : x - Step 2: Convert to fraction form
90,768.74/136,135.11 = 86,267.94/x - Step 3: Cross multiply
90,768.74x = 136,135.11 × 86,267.94 - Step 4: Simplify right side
90,768.74x = 11,744,095,501.37 - Step 5: Solve for x
x = 11,744,095,501.37/90,768.74 - Step 6: Final answer
x = 129,384.80
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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.