Finding the Fourth Proportional to 147,742.81, 221,738.20 and 76,709.05
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Solution
The fourth proportional to 147,742.81, 221,738.20 and 76,709.05 is: 115,127.95
Step by Step Solution
- Step 1: Write the proportion equation
147,742.81 : 221,738.20 = 76,709.05 : x - Step 2: Convert to fraction form
147,742.81/221,738.20 = 76,709.05/x - Step 3: Cross multiply
147,742.81x = 221,738.20 × 76,709.05 - Step 4: Simplify right side
147,742.81x = 17,009,326,670.71 - Step 5: Solve for x
x = 17,009,326,670.71/147,742.81 - Step 6: Final answer
x = 115,127.95
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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.