Finding the Fourth Proportional to 145,957.68, 201,421.89 and 78,889.68
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Solution
The fourth proportional to 145,957.68, 201,421.89 and 78,889.68 is: 108,867.92
Step by Step Solution
- Step 1: Write the proportion equation
145,957.68 : 201,421.89 = 78,889.68 : x - Step 2: Convert to fraction form
145,957.68/201,421.89 = 78,889.68/x - Step 3: Cross multiply
145,957.68x = 201,421.89 × 78,889.68 - Step 4: Simplify right side
145,957.68x = 15,890,108,447.10 - Step 5: Solve for x
x = 15,890,108,447.10/145,957.68 - Step 6: Final answer
x = 108,867.92
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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.