Finding the Fourth Proportional to 88,421.36, 121,985.40 and 54,419.59
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Solution
The fourth proportional to 88,421.36, 121,985.40 and 54,419.59 is: 75,076.82
Step by Step Solution
- Step 1: Write the proportion equation
88,421.36 : 121,985.40 = 54,419.59 : x - Step 2: Convert to fraction form
88,421.36/121,985.40 = 54,419.59/x - Step 3: Cross multiply
88,421.36x = 121,985.40 × 54,419.59 - Step 4: Simplify right side
88,421.36x = 6,638,394,844.06 - Step 5: Solve for x
x = 6,638,394,844.06/88,421.36 - Step 6: Final answer
x = 75,076.82
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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.