Finding the Fourth Proportional to 129,134.16, 178,189.20 and 74,695.68
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Solution
The fourth proportional to 129,134.16, 178,189.20 and 74,695.68 is: 103,070.82
Step by Step Solution
- Step 1: Write the proportion equation
129,134.16 : 178,189.20 = 74,695.68 : x - Step 2: Convert to fraction form
129,134.16/178,189.20 = 74,695.68/x - Step 3: Cross multiply
129,134.16x = 178,189.20 × 74,695.68 - Step 4: Simplify right side
129,134.16x = 13,309,963,462.66 - Step 5: Solve for x
x = 13,309,963,462.66/129,134.16 - Step 6: Final answer
x = 103,070.82
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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.