Finding the Fourth Proportional to 97,811.28, 134,978.40 and 55,378.08
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Solution
The fourth proportional to 97,811.28, 134,978.40 and 55,378.08 is: 76,421.09
Step by Step Solution
- Step 1: Write the proportion equation
97,811.28 : 134,978.40 = 55,378.08 : x - Step 2: Convert to fraction form
97,811.28/134,978.40 = 55,378.08/x - Step 3: Cross multiply
97,811.28x = 134,978.40 × 55,378.08 - Step 4: Simplify right side
97,811.28x = 7,474,844,633.47 - Step 5: Solve for x
x = 7,474,844,633.47/97,811.28 - Step 6: Final answer
x = 76,421.09
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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.