Finding the Fourth Proportional to 89,988.19, 135,121.01 and 76,130.31
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Solution
The fourth proportional to 89,988.19, 135,121.01 and 76,130.31 is: 114,312.82
Step by Step Solution
- Step 1: Write the proportion equation
89,988.19 : 135,121.01 = 76,130.31 : x - Step 2: Convert to fraction form
89,988.19/135,121.01 = 76,130.31/x - Step 3: Cross multiply
89,988.19x = 135,121.01 × 76,130.31 - Step 4: Simplify right side
89,988.19x = 10,286,804,231.34 - Step 5: Solve for x
x = 10,286,804,231.34/89,988.19 - Step 6: Final answer
x = 114,312.82
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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.