Finding the Fourth Proportional to 121,421.99, 167,668.10 and 76,177.76
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Solution
The fourth proportional to 121,421.99, 167,668.10 and 76,177.76 is: 105,191.65
Step by Step Solution
- Step 1: Write the proportion equation
121,421.99 : 167,668.10 = 76,177.76 : x - Step 2: Convert to fraction form
121,421.99/167,668.10 = 76,177.76/x - Step 3: Cross multiply
121,421.99x = 167,668.10 × 76,177.76 - Step 4: Simplify right side
121,421.99x = 12,772,579,062.23 - Step 5: Solve for x
x = 12,772,579,062.23/121,421.99 - Step 6: Final answer
x = 105,191.65
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1.5x scale
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.