Finding the Fourth Proportional to 97,989.76, 135,292.65 and 65,772.70
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Solution
The fourth proportional to 97,989.76, 135,292.65 and 65,772.70 is: 90,811.15
Step by Step Solution
- Step 1: Write the proportion equation
97,989.76 : 135,292.65 = 65,772.70 : x - Step 2: Convert to fraction form
97,989.76/135,292.65 = 65,772.70/x - Step 3: Cross multiply
97,989.76x = 135,292.65 × 65,772.70 - Step 4: Simplify right side
97,989.76x = 8,898,562,880.66 - Step 5: Solve for x
x = 8,898,562,880.66/97,989.76 - Step 6: Final answer
x = 90,811.15
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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.