Finding the Fourth Proportional to 122,303.80, 168,707.64 and 76,909.96
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Solution
The fourth proportional to 122,303.80, 168,707.64 and 76,909.96 is: 106,090.72
Step by Step Solution
- Step 1: Write the proportion equation
122,303.80 : 168,707.64 = 76,909.96 : x - Step 2: Convert to fraction form
122,303.80/168,707.64 = 76,909.96/x - Step 3: Cross multiply
122,303.80x = 168,707.64 × 76,909.96 - Step 4: Simplify right side
122,303.80x = 12,975,297,844.09 - Step 5: Solve for x
x = 12,975,297,844.09/122,303.80 - Step 6: Final answer
x = 106,090.72
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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.