Finding the Fourth Proportional to 87,987.09, 121,423.05 and 47,700.77
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Solution
The fourth proportional to 87,987.09, 121,423.05 and 47,700.77 is: 65,827.52
Step by Step Solution
- Step 1: Write the proportion equation
87,987.09 : 121,423.05 = 47,700.77 : x - Step 2: Convert to fraction form
87,987.09/121,423.05 = 47,700.77/x - Step 3: Cross multiply
87,987.09x = 121,423.05 × 47,700.77 - Step 4: Simplify right side
87,987.09x = 5,791,972,373.63 - Step 5: Solve for x
x = 5,791,972,373.63/87,987.09 - Step 6: Final answer
x = 65,827.52
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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.