Finding the Fourth Proportional to 128,135.61, 176,811.98 and 70,771.53
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Solution
The fourth proportional to 128,135.61, 176,811.98 and 70,771.53 is: 97,656.33
Step by Step Solution
- Step 1: Write the proportion equation
128,135.61 : 176,811.98 = 70,771.53 : x - Step 2: Convert to fraction form
128,135.61/176,811.98 = 70,771.53/x - Step 3: Cross multiply
128,135.61x = 176,811.98 × 70,771.53 - Step 4: Simplify right side
128,135.61x = 12,513,253,993.07 - Step 5: Solve for x
x = 12,513,253,993.07/128,135.61 - Step 6: Final answer
x = 97,656.33
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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.