Finding the Fourth Proportional to 121,985.76, 168,347.76 and 68,269.66
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Solution
The fourth proportional to 121,985.76, 168,347.76 and 68,269.66 is: 94,216.28
Step by Step Solution
- Step 1: Write the proportion equation
121,985.76 : 168,347.76 = 68,269.66 : x - Step 2: Convert to fraction form
121,985.76/168,347.76 = 68,269.66/x - Step 3: Cross multiply
121,985.76x = 168,347.76 × 68,269.66 - Step 4: Simplify right side
121,985.76x = 11,493,044,336.96 - Step 5: Solve for x
x = 11,493,044,336.96/121,985.76 - Step 6: Final answer
x = 94,216.28
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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.