Finding the Fourth Proportional to 137,201.79, 189,315.85 and 86,178.17
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Solution
The fourth proportional to 137,201.79, 189,315.85 and 86,178.17 is: 118,911.66
Step by Step Solution
- Step 1: Write the proportion equation
137,201.79 : 189,315.85 = 86,178.17 : x - Step 2: Convert to fraction form
137,201.79/189,315.85 = 86,178.17/x - Step 3: Cross multiply
137,201.79x = 189,315.85 × 86,178.17 - Step 4: Simplify right side
137,201.79x = 16,314,893,028.41 - Step 5: Solve for x
x = 16,314,893,028.41/137,201.79 - Step 6: Final answer
x = 118,911.66
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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.