Finding the Fourth Proportional to 83,421.84, 115,129.22 and 47,129.95
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Solution
The fourth proportional to 83,421.84, 115,129.22 and 47,129.95 is: 65,043.34
Step by Step Solution
- Step 1: Write the proportion equation
83,421.84 : 115,129.22 = 47,129.95 : x - Step 2: Convert to fraction form
83,421.84/115,129.22 = 47,129.95/x - Step 3: Cross multiply
83,421.84x = 115,129.22 × 47,129.95 - Step 4: Simplify right side
83,421.84x = 5,426,034,688.06 - Step 5: Solve for x
x = 5,426,034,688.06/83,421.84 - Step 6: Final answer
x = 65,043.34
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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.