Finding the Fourth Proportional to 122,639.86, 169,243.68 and 71,655.58
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Solution
The fourth proportional to 122,639.86, 169,243.68 and 71,655.58 is: 98,885.09
Step by Step Solution
- Step 1: Write the proportion equation
122,639.86 : 169,243.68 = 71,655.58 : x - Step 2: Convert to fraction form
122,639.86/169,243.68 = 71,655.58/x - Step 3: Cross multiply
122,639.86x = 169,243.68 × 71,655.58 - Step 4: Simplify right side
122,639.86x = 12,127,254,051.73 - Step 5: Solve for x
x = 12,127,254,051.73/122,639.86 - Step 6: Final answer
x = 98,885.09
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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.