Finding the Fourth Proportional to 137,272.29, 189,430.08 and 79,913.09
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Solution
The fourth proportional to 137,272.29, 189,430.08 and 79,913.09 is: 110,276.76
Step by Step Solution
- Step 1: Write the proportion equation
137,272.29 : 189,430.08 = 79,913.09 : x - Step 2: Convert to fraction form
137,272.29/189,430.08 = 79,913.09/x - Step 3: Cross multiply
137,272.29x = 189,430.08 × 79,913.09 - Step 4: Simplify right side
137,272.29x = 15,137,943,809.17 - Step 5: Solve for x
x = 15,137,943,809.17/137,272.29 - Step 6: Final answer
x = 110,276.76
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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.